Mms: use Holo Light theme

PS6:  Changed actionbar buttons order so delete
      is the right-most one.
PS8:  Added "mark as read" drawables (thanks Björn)
PS10: Fixed ActionBar text color.

Screenshots:
  https://dl.dropboxusercontent.com/u/16268774/cm_temp/newmms1.jpg
  https://dl.dropboxusercontent.com/u/16268774/cm_temp/newmms2.jpg
  https://dl.dropboxusercontent.com/u/16268774/cm_temp/newmms3.jpg

Change-Id: I8eefe77687d03b143a85261413a05e3ed76ba090