Frameworks: Recent Apps Clear All Button Location [2/2]

Allows the user to select if the want the Recent Apps Clear All Button on the left or right side of the screen.

PatchSet:
- fix gravity

PatchSet:
- fix gravity again
- fix wrong spacing
- small cleanup

Change-Id: I815b8ed5c702c925da01a4f8c7080d9ff365e1ff
PS: THIS COMMIT ALSO CONTAINS A BUNCH OF EARLY FIXES MADE BY KUFIKUGEL.