* Change to display SVG files as images

* Remove unsafe styles from SVG CSP

* Add integration test to test SVG headers

* Add config setting to disable SVG rendering

* Add test for img tag when loading SVG image

* Remove the Raw view button for svg files since we don't fully support this

* Fix copyright year

* Rename and move config setting

* Add setting to cheat sheet in docs

* Fix so that comment matches cheat sheet

* Add allowing styles in CSP based on pull request feedback

* Re-enable raw button since we show SVG styles now

* Change so that SVG files are editable

* Add UI to toggle between source and rendered image for SVGs

* Change to show blame button for SVG images

* Fix to update ctx data

* Add test for DetectContentType when file is longer than sniffLen

Co-authored-by: Jonathan Tran <jon@allspice.io>
Co-authored-by: Kyle D <kdumontnu@gmail.com>

Co-authored-by: Bwko <bouwko@gmail.com>
Co-authored-by: techknowlogick <matti@mdranta.net>
Co-authored-by: zeripath <art27@cantab.net>

* Frontend

* Backend

* only show 2FA-Reset option if posible

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

* Add Icon URL to Backend

* Template for Icon URL

* Localization & Edit Icon URL

* Improve Custom Icon URL

* Removed not working else

Co-authored-by: 6543 <6543@obermui.de>

* Disable SSH key addition and deletion when externally managed

When a user has a login source which has SSH key management
key addition and deletion using the UI should be disabled.

Fix #13983

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

* Make only externally managed keys disabled

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

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

* Standardize Co-Authored-By / Reviewed-By strings

* Use lowercase variant

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

Saying "this issue" is confusing because it could be understood as the
issue that the user is currently viewing, not which the "issue" link
points to.

* Diff stat improvements

- Combine number to just total number of changes
- Add tooltip over stats bar
- Increase contrast on file name
- Refactor classes and CSS to be more reusable

* misc tweaks

* make count bold

* add pull request command line instructions

* Add pull request manually merge instuction

* Fix styles

* Fix lint

* Move inline style to class file

* add space between merge button and hint text

* Add sentence end charcter

* Change the language file

* adjust secondary bg

* further adjustment

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