CMParts: applications: Add Expanded Desktop settings

Original work by:
 - Kyrylo Mikos
 - Dave Kover
 - Clark Scheff
 - Adnan Begovic

This consists of the following Settings commits from CM 13.0:
dd6f7452d4bc5e6a4cb6497d48ed61e3f1d1faba Settings: Squashed commit for expanded desktop
fd3eb78710e902a9c7d48af069cde0b03bba26bc Break out status bar icon from extdesk icon.
2794f4fe351fd96ce04b6d8ce4854a3362ac88ef Settings: Make sure to rebuild on app entries loaded.

Change-Id: I5ae9080cf19962c38899c90e1e0288835e2043d4