Support keyboard navigation over multiple monitors in multitasking view #2536
+312
−218
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Instead of manually handling keyboard focus where needed, do it like GTK does it with some adaptations.
We have the FocusController which is added to the "root" focusable of a focus tree (e.g. mtv or window overview).
Then we have the focusable class which is subclassed by the actors in the actor tree where focus is needed. The focusable handles deciding which implementor gets the focus based on the direction.
We now also hide the focus indicator after 5 seconds.
Fixes #2651
Fixes #2648
We can easily add navigation via Tab now too but I would leave that to a follow up