Make expandable volume panel take all the wasted space.
Add an option to make the panel fully expand.
Merge branch 'master' of https://github.com/C3C0/GravityBox into expandable-volume-panel-patch-1
Oops, got confused with the intent key and the pref key.
Fixed XML formatting, eclipse messed it up.
Completely missed the fact that there was an existing hook for the method "expand".
Merge pull request #232 from MohammadAG/expandable-volume-panel-patch-1

Allow the volume panel to expand taking up all the space