Backport #25134 by @silverwind
- Fix and improve mobile navbar layout
- Apply all cleanups suggested in
https://github.com/go-gitea/gitea/pull/25111
- Make media query breakpoints match Fomantic's exactly
- Clean up whitespace in class on navbar items
Mobile navbar before and after:
<img width="745" alt="Screenshot 2023-06-08 at 08 40 56"
src="ca84b239-b10f-41db-8c06-dcf2b6dd9d28">
<img width="739" alt="Screenshot 2023-06-08 at 08 41 23"
src="09133c54-eb7e-4110-858c-ead23c3b7521">
- Fix bold helper classes that were broken because of CSS syntax error
- Refined the repo list CSS and layout
- Removing bold
- Downsize the mirror icon to fit
- Fix icon positions
- Adapted the org list to match
- Center the '+' icon and mute it
<img width="385" alt="Screenshot 2023-05-25 at 18 38 31"
src="ac8d6efb-5751-4845-a4ab-db1ddaf36ec3">
<img width="384" alt="Screenshot 2023-05-25 at 18 30 29"
src="bbd39ae7-da9d-4c6f-bfe3-42f28b7a74c3">
Before:

After:

private or internal repos have `lock` icon, no need to add highlights to
them.
A vertical overflow appears in Firefox 112/MacOS 12.6 when the system
setting for scrollbars is to "Always" show them.
---
Here, the fixed 100vw container widths are removed, which removes the
overflow. It is, however, only simulated in Developer Tools in latest
Firefox and Chromium, so please test on a Gitea installation.
Ran most of the Less files through the Less compiler and Prettier and
then followed up with a round of manual fixes.
The Less compiler had unfortunately stripped all `//` style comments
that I had to restore (It did preserve `/* */` comments). Other fixes
include duplicate selector removal which were revealed after the
transpilation and which weren't caught by stylelint before but now are.
Fixes: https://github.com/go-gitea/gitea/issues/15565