Quicksettings: Few misc adjustements and fixes.

* Fix sleep time tile label on clean flash boot, was showing unknown till you set it in settings.
  Initialize screen timeout with default 30 seconds (wrongly initialized with 0 that is never compared).
* Use switch statement (better performance wise).
* Bit cleanup for wifi ap tile, useless resources reload.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>