* Remove experimental pinning feature again and instead allow using a
normal window
* Pinning made it inconvenient to close the (frameless) window again
* Pinning required hiding/showing the window which didn't look very
nice (and setting flags directly via `QWindow` didn't work as well)
* As normal application/window positioning issues on Wayland are less
problematic (and those aren't going to be fixed any time soon, if at all)
* Include the conventional copy & paste installation instructions that
most Ubuntu (and derivatives) users expect.
* Request that users test their operating system's app store, because
a potential Appstream bug would be highly visible and would negatively
affect initial user impressions. Such a hypothetical bug should
ideally be found and fixed before Ubuntu 22.10's freeze, and certainly
before Debian 12's.
* Mention the backports repository, because otherwise users will
manually install packages for sid/unstable/testing/bookworm/12 onto
stable/bullseye/11. These packages will be nonfunctional, will
malfunction, or will break the other package's dependencies.
* Remove link to Developer Information Tracker, because it may also
mislead users into creating FrankenDebian, and because it is not
supposed to be a user-facing page.
* The licensing badge does not work anymore and the licensing topic is more
complicated to fit into a badge anyways
* The release badge does not look good on its own and is redundant with
GitHub's own UI since they've reworked it
Most importantly, mention generic GNU/Linux binaries which
be available on the next release in favor of AppImage (which
is still using/bundling very outdated libraries and therefore
not recommended).
* FontAwesome uses a propritary build system so let's move to its fork
ForkAwesome similar to Syncthing
* See https://github.com/syncthing/syncthing/pull/5237
* Bundle the font file instead of having the SVGs directly within
Syncthing Tray's own repository