ROMControl: Lockscreen Theme Color [2/2]

PS2: Fix color dialog canceling action.
PS2: Change wording (due to framework update)

Change-Id: I987b194b2d3e5e48a444fa5914ea666aaf4cb784
Merge branch 'jb-mr2' of https://github.com/AOKP/packages_apps_ROMControl into HEAD