Follow #24097 and #24285

And add a devtest page for modal action button testing.
http://localhost:3000/devtest/fomantic-modal

Now the `modal_actions_confirm.tmpl` could support: green / blue /
yellow positive buttons, the negative button is "secondary".

ps: this PR is only a small improvement, there are still a lot of
buttons not having proper colors. In the future these buttons could be
improved by this approach.

These buttons could also be improved according to the conclusion of
#24285 in the future.



![image](https://user-images.githubusercontent.com/2114189/233847773-a6d6b29b-7b5c-490e-8425-40dfd0ad2529.png)


And add GitHub-like single danger button (context:
https://github.com/go-gitea/gitea/issues/24285#issuecomment-1519100312)


![image](https://user-images.githubusercontent.com/2114189/233891566-055d7611-894d-4d5a-baf5-f6369180bf8d.png)

---------

Co-authored-by: silverwind <me@silverwind.io>

Co-Author: @wxiaoguang 

This is the first step of #24229. And this PR will only includes html
changes, and followed by other PRs that fine tune css and change to
submenus.

After:

Admin Level

<img width="1400" alt="Screen Shot 2023-04-21 at 10 07 16"
src="https://user-images.githubusercontent.com/17645053/233523870-f848b61d-056a-4b41-9760-a9a49fea1fe8.png">

User Level

<img width="1422" alt="Screen Shot 2023-04-21 at 10 07 23"
src="https://user-images.githubusercontent.com/17645053/233523878-979adb20-a657-43d9-99a6-ad414010c0ef.png">

Repo Level

<img width="1404" alt="Screen Shot 2023-04-21 at 10 07 07"
src="https://user-images.githubusercontent.com/17645053/233523863-337440bd-c03a-4dfd-87fa-cef40300bfe0.png">

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Co-Author: @wxiaoguang 

This PR is to fix
https://github.com/go-gitea/gitea/issues/23318#issuecomment-1506275446 .
The way to fix this in this PR is to use `delete_modal_actions.tmpl`
here both to fix this issue and keep ui consistency (as suggested by
[TODO
here](4299c3b7db/templates/projects/view.tmpl (L161)))

And this PR also refactors `delete_modal_actions.tmpl` and its related
styles, and use the template for more modal actions:

1. Added template attributes:
* locale
* ModalButtonStyle: "yes" (default) or "confirm"
* ModalButtonCancelText
* ModalButtonOkText

2. Rename `delete_modal_actions.tmpl` template to
`modal_actions_confirm.tmpl` because it is not only used for action
modals deletion now.

3. Refactored css related to modals into `web_src/css/modules/modal.css`
and improved the styles.

4. Also use the template for PR deletion modal and remove issue
dependency modal.

5. Some modals should also use the template, but not sure how to open
them, so mark these modal actions by `{{/* TODO: Convert to
base/modal_actions_confirm */}}`

After (Also tested on arc green):

Hovering on the left buttons

<img width="711" alt="Screen Shot 2023-04-23 at 15 17 12"
src="https://user-images.githubusercontent.com/17645053/233825650-76307e65-9255-44bb-80e8-7062f58ead1b.png">

<img width="786" alt="Screen Shot 2023-04-23 at 15 17 21"
src="https://user-images.githubusercontent.com/17645053/233825652-4dc6f7d1-a180-49fb-a468-d60950eaee0d.png">

Test for functionalities:

https://user-images.githubusercontent.com/17645053/233826857-76376fda-022c-42d0-b0f3-339c17ca4e59.mov

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

This improves a lot of accessibility shortcomings.
Every possible instance of `<div class="button">` matching the command
`ag '<[^ab].*?class=.*?[" ]button[ "]' templates/ | grep -v 'dropdown'`
has been converted when possible.
divs with the `dropdown` class and their children were omitted as
1. more analysis must be conducted whether the dropdowns still work as
intended when they are a `button` instead of a `div`.
2. most dropdowns have `div`s as children. The HTML standard disallows
`div`s inside `button`s.
3. When a dropdown child that's part of the displayed text content is
converted to a `button`, the dropdown can be focused twice

Further changes include that all "gitea-managed" buttons with JS code
received an `e.preventDefault()` so that they don't accidentally submit
an underlying form, which would execute instead of cancel the action.
Lastly, some minor issues were fixed as well during the refactoring.

## Future improvements

As mentioned in
https://github.com/go-gitea/gitea/pull/23337#discussion_r1127277391,
`<a>`s without `href` attribute are not focusable.
They should later on be converted to `<button>`s.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

* Add main aria landmark to templates
 * Adjust some titles to improve understanding of location in navigation

Contributed by @Forgejo

Replace `active{{end}} item` with `active{{end}} item`.

* Refactor `i18n` to `locale`

- Currently we're using the `i18n` variable naming for the `locale`
struct. This contains locale's specific information and cannot be used
for general i18n purpose, therefore refactoring it to `locale` makes
more sense.
- Ref: https://github.com/go-gitea/gitea/pull/20096#discussion_r906699200

* Update routers/install/install.go

* make blue really blue

* replace blue button and label classes with primary

* add --color-blue-dark

* add light color variants, tweak a few colors

* fix colors

* add comment

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Start making the mobile experience not painful and be actually usable. This contains a few smaller changes to enhance this experience.

- Submit buttons on the review forms aren't columns anymore and are now allowed to be displayed on one row.
- The label/milestone & New Issue buttons were given each own row even tough, there's enough place to do it one the same row. This commit fixes that.
- The issues+Pull tab on repo's has a third item besides the label/milestone & New Issue buttons, the search bar. On desktop there's enough place to do this on one row, for mobile it isn't, currently it was using for each item a new row. This commits fixes that by only giving the searchbar a new row and have the other two buttons on the same row.
- The notification table will now be show a scrollbar instead of overflow.
- The repo buttons(Watch, Star, Fork) on mobile were showing quite big and the SVG wasn't even displayed on the same line, if the count of those numbers were too high it would even overflow. This commit removes the SVG, as there isn't any place to show them on the same row and allows them to have a new row if the counts of those buttons are high.
- The admin page can show you a lot of interesting information, on mobile the System Status + Configuration weren't properly displayed as the margin's were too high. This commit fixes that by reducing the margin to a number that makes sense on mobile.
- Fixes to not overflow the tables but instead force them to be scrollable.
- When viewing a issue or pull request, the comments aren't full-width but instead 80% and aligned to right, on mobile this is a annoyance as there isn't much width to begin with. This commits fixes that by forcing full-width and removing the avatars on the left side and instead including them inline in the comment header.

There are multiple places where Gitea does not properly escape URLs that it is building and there are multiple places where it builds urls when there is already a simpler function available to use this.
    
This is an extensive PR attempting to fix these issues.

1. The first commit in this PR looks through all href, src and links in the Gitea codebase and has attempted to catch all the places where there is potentially incomplete escaping.
2. Whilst doing this we will prefer to use functions that create URLs over recreating them by hand.
3. All uses of strings should be directly escaped - even if they are not currently expected to contain escaping characters. The main benefit to doing this will be that we can consider relaxing the constraints on user names and reponames in future. 
4. The next commit looks at escaping in the wiki and re-considers the urls that are used there. Using the improved escaping here wiki files containing '/'. (This implementation will currently still place all of the wiki files the root directory of the repo but this would not be difficult to change.)
5. The title generation in feeds is now properly escaped.
6. EscapePound is no longer needed - urls should be PathEscaped / QueryEscaped as necessary but then re-escaped with Escape when creating html with locales Signed-off-by: Andrew Thornton <art27@cantab.net>

Signed-off-by: Andrew Thornton <art27@cantab.net>

This dangling character was leftover from commit c85bb62635 from PR #13860

* Replace more icons with SVG

- Replace remaining icons on admin page with SVG
- Fix vertical menu background on arc-green
- Minor improvments to frontpage repo search
- More icon replacements here and there

* fix integration

* whitespace tweak

* add comment

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

* Add class to page content to unify top margin

Previously pages would individually set this margin but some didn't so
content would stick to the header without any space. Resolve this by
adding a new class that is added on all pages. The only place where we
remove this margin again is on the pages with menu or wrapper in the
header.

* fix admin notices

* fix team pages

* fix loading segment on gitgraph for arc-green

* fix last missing case

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

* Comment box tweaks and SVG dropdown triangles

- Change all dropdown triangles to SVG
- Bring inline review comment box closer to regular comment boxes
- Enhance arc-green checkbox contrast
- Minor reaction tweaks
- Flexbox the diff file header

* remove a border

* fix type marker in arc-green

* add small code padding

* fix position regression and remove useless rules

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

* [UI] Sortable Tables Header By Click

* get rid of padding above header

* restart CI

* fix lint

* convert getArrow JS to SortArrow go func

* addopt SortArrow funct

* suggestions from @silverwind - tablesort.js

Co-authored-by: silverwind <me@silverwind.io>

* Update web_src/js/features/tablesort.js

Co-authored-by: silverwind <me@silverwind.io>

* Update web_src/js/features/tablesort.js

Co-authored-by: silverwind <me@silverwind.io>

Co-authored-by: silverwind <me@silverwind.io>

Fomantic-ui's action button syntax requires that the button is
the next sibling of the input it is attached to and that they
are both children of a div.action.

Fix #11375

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: Lauris BH <lauris@nix.lv>

* Implement mail activation admin panel

* Add export comments

* Fix another export comment

* again...

* And again!

* Apply suggestions by @lunny

* Add UI for user activated emails

* Make new activation UI work

* Fix lint

* Prevent admin from self-deactivate; add modal

Co-authored-by: zeripath <art27@cantab.net>