DC: rework freezer

put all in ONE list, user and system apps, enabled and disabled apps

system apps have a red label, user apps a white one.
disabled apps have a grey layer on top of the list entry

when clicking on a list entry, it opens a dialog with the icon and app name
as title and displays options, for now only enabling / disabling

Change-Id: Ic8e876747ffbe2412fbefa214d66af2a92c0475b