1. Use general "mobile-only" and "not-mobile" CSS styles, remove some`@media (max-width: 767.98px)` tricks
2. Use `CountFmt` for repo list, just like the repo header (and it matches GitHub, to avoid big numbers bloat the page)
(cherry picked from commit bfa160fc98a23923b6ce1cd4d99e8970d937d6ec)
Conflicts:
templates/explore/repo_list.tmpl
templates/repo/header.tmpl
web_src/css/repo/header.css
Resolved the template conflicts by porting the changes to Forgejo (in
case of `header.tmpl`, applying the changes in `header_fork.tmpl). In
case of the CSS change, opted to take Gitea's version and drop the
entire media query.
The elements were hidden on small screens to preserve space and the
icons still conveyed the meaning for users with intact eye vision.
However, the names were no longer exposed to screen readers, and their
users usually cannot obtain the meaning from the icons.
Adding aria-labels to the affected templates results in certain
complexity due to the DOM, so instead I decided to use some accessible
CSS tricks to move the content off the screen instead of hiding it. It
should remain accessible for most screen readers.
