Sandboxed apps that run without a window are detected by the new
background monitoring service, introduced by xdg-desktop-portal.
We have an opportunity to improve the predictability of the desktop
and ensure that application state in transparently reported to users
by showing these apps, and allowing them to closed.
Add a new background apps menu to the quick settings, that is always
added at the bottom of the popover, and has a slightly custom, flat
style applied to it.
Show background-running apps in this menu, and allow closing them
by first attempting to execute the 'quit' action through D-Bus, and
if that fails, sending SIGKILL to the process.
See https://gitlab.gnome.org/Teams/Design/os-mockups/-/issues/191
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2624>
Menu toggles are currently regular toggles with an additional
arrow button. This allows for a simpler implementation, but
has downsides with regards to keyboard navigation and hover
feedback.
To make it more obvious that the two parts of the menu toggle
perform different actions, change the overall structure of the
toggle to *contain* a regular toggle and the menu button.
That way each element uses its own hover effect, and shows up
in the keynav focus chain.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5964
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2632>
GTK4 changed icon loading significantly, it is now closely tied
to snapshots and paintables. This makes a port highly unrealistic,
so to avoid staying stuck on GTK3 forever, copy the relevant code
into the tree.
The code is unmodified except for the include names and replacing
some stray tab indentation. It is still full of GTK internals, so
it will take a while before we can actually build it.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2620>
