[1/2] base: task utils and navigation bar

http://jira.omnirom.org/browse/OMNI-398
http://jira.omnirom.org/browse/OMNI-345

-added switch to last app as navigation ring target
-added optional kill on long press on back

PS2
much easier :)

PS3
whitespaces

Change-Id: I31f11fcd0efb90f007017fa16567e6711002ecc8
Base: fix Editbutton and handle tracking on QuickSwipe

Change-Id: I3ab0e0a0ef40037b6fac16e1875144ff383a6a42
Base: fix QuickSettings Scrollview

fix http://jira.omnirom.org/browse/OMNI-414

Change-Id: I698cffda5016f51b9aa45df74fb56795553f208a
Merge pull request #4 from omnirom/android-4.4

merge request