Fomantic brings a opinionated style that removed underline on mouse
hover which I think is important UX to have.

This re-enables the underline in the Fomantic config and fixes a few
cases where underline was deemed disruptive.

CSS-only tooltips suffer various issues with positioning and there was
only one single instance of them in the templates. Replace that instance
with a regular popup and exclude these `data-tooltip` styles from the
Fomantic build.

* Remove unused Fomantic sidebar module

The [Sidebar](https://fomantic-ui.com/modules/sidebar.html) module seems
currently unused (at least I can't find any reference to it in templates
or js), so remove it from the Fomantic build.

* remove useless minified fomantic build files

* mark fomantic build files as being generated

* Restore #10096/#8638 and re-fix #15172

This PR restores the vendored and patched dropdow from #8638. It
however, abandons the calls to `click()` using instead the default
dropdown click calls instead. This prevents the issue of the dropdown
grabbing focus permanently however, this may have negative effects on
the effect of focus on the dropdowns.

Of note, the behaviour of the template selector dropdown on the repo
creation page is slightly odd - I don't believe that this odd behaviour
is caused by this PR but rather by the feed source for this. I suspect
that the dropdown should be adding a delete button to its selection.

Fix #15172
References: #7057

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

* leverage fomantic-build instead

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

* as per jookia

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

* Fix various doc, user-facing, and source comment typos

Found via `codespell -q 3 -S ./options/locale,./vendor -L ba,pullrequest,pullrequests,readby`

Replace it with native <detail> element. Did some slight restyling on
the release downloads, new behaviour should be exactly the same
otherwise.

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

* Improve disabled styles for repo buttons

- Simplify disabled styling of label by matching for the disabled
  attribute.
- Raise fomantic disabled opacity from .45 to .55 to for more contrast.
- Use CSS vars for basic button styles.

* restore clickability on label

* color tweaks and remove arc-green style

* slightly reduce button size

* consolidate vars

* also cover active class

* slightly more distinct active class

* remove useless rule

We already have custom scrollbars in our own CSS which are superior to
Fomantic's so diable them to save a few bytes and prevent interference.

* CSS color variables, less bold font weight

- Define color variables for fully saturated colors and apply them where
  it made sense
- Add background color helper classes
- Globally reduce bold font weight from 700 to 500
- Remove border from timeline icons
- Unify dropzone styling
- Various border style consolidations

* attempt to fix test

* another attempt at tests

* fix contains

Saves is from doing it manually and saves a few CSS bytes.

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

We rarely change fomantic-ui or its configuration so it's kind of a
waste to have it rebuild on every CI run. These changes remove the
fomantic files from the build and instead add the relevant output files
to the git index, which should shave of 2-3 minutes on every CI run.

`make fomantic` should still work and should be ran whenever fomantic is
updated or its configuration is changed.

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