This adds a gesture handle mode to the navigation panel, which can be
enabled during gesture-only mode. This reserves space for the system
gesture to be able to be used, allowing us to extend the height in KWin
of the gesture recognition area (which is currently far too short for devices such as Pixel 3a).
This also allows for navigation with a mouse; clicking on the handle
triggers the task switcher, holding it triggers the "home" action.
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.
Disables gesture navigation when Action Drawer, Notification Popup Drawer, or VolumeOSD are visible as activating the task switcher in these situation can feel a bit weird.
Note:
~~Draft for in till I can get side loading working again so I can test it on device.~~
Still can't seem to get side loading working quite yet. Though, I did run the test I could from my laptop and it does seems to be working fine, so I will be removing this from draft.
