fb: add theme switch (TRDS) to pie (1/2)
and show toast if a mode is running wich does not support
lightsensors

- rebase

Change-Id: Ie89589e1e0343e734728f0db00171a4e137370bb
Fix pie control + slim recents issue

Fix slim recents showing without last task (or even empty)

as we can't set double tap or long press action for navbar and pie,
there are no need to (cancel) preload recent apps when pressing home via navbar or pie.

Change-Id: Ife7c9698ada4bf7d069bd32215f415a235cb6a2b