Settings: Reorganize Greek translations

Revert AOSP strings
Rearrange CM additions.
Slight reword of some strings to match original English strings
Add translation for:
* volume/dock battery/expanded desktop tiles
* swap volume buttons
* ad-hoc
* pie controls
* stylus gestures
* overhauled auto-brightness

Change-Id: Ia65cecf70f8e58542329bc111fb0bcd5aa75ad37