Trebuchet : Show cling for allapps overview

This patchset adds a cling for the all apps indicator overview mode
as by default it is not very discoverable.

PS4: Strings + fixes

Change-Id: If7e91a0e123c0fbc4d4f4ed6ef35c1ff7b1abfb1
Merge branch 'cm-11.0' into martincz