Statusbar behavior: Auto hide options [1/2]

We can now choose to auto hide when there are no non-permanent notifications, or non at all.

This is HardCorePawn's "Specify notification types for Auto Hide.."
& kufikugel's "take notification size into account.." applied to our statusbar behavior pref.
Credits to both of them!

- Fixed auto hide logic

Signed-off-by: Andros Rosa <andros2011@gmail.com>