Right-clicking the desktop or dock background opened the mobile
settings overlay, which is a long-press gesture for touchscreens.
In convergence mode show a popup menu instead with three items:
Desktop and Wallpaper, Add Widgets, and Configure Desktop.
Long-press still opens the settings overlay on all form factors.
This refactors the homescreen state object to isolate drag & drop from
swipe states, allowing for using proper system-level drag & drop for delegate
movement. This then ports the new applet list to use it.
This switching Folio and Halcyon to define their settings as a
containment config so that it fits in with the other containment
options.
This removes the convoluted maze of nested settings windows due to
wrapping the containment settings with a custom settings window around
it.
This converts many of the animation durations to Kirigami units so that
they can be controlled system wide. It also speeds up several of the
animation durations (ex. in folio) from 800ms to 400ms to improve the
feel and responsiveness of the shell.
Apparently i18n doesn't support string literals with single quotes as
parameters. Fix occurrences of this and add a CI check to ensure this
won't happen in the future.
