[gnome-shell] (17 commits) Created branch wip/message-tray

[Debarshi Ray <debarshir src gnome org>]

The branch 'wip/message-tray' was created.

Summary of new commits:

  0ae8223... messageTray: Clone, clip & move the window_group when tray 
  b1a2613... messageTray: restyle the message tray
  7695071... theme: Use the proper syntax for background-repeat
  c95b9e2... theme: Update theme
  ecb0edb... messageTray: Clean up code
  8aeb198... messageTray: Use the standard :hover pseudo-class
  97641cf... messageTray: don't time out banners when the user is inacti
  461f65b... messageTray: don't show the tray after new items are added
  68ee7a2... message-tray: Add :overview pseudo class when in overview
  a63cffd... theme: Update message-tray style in the overview
  8cf3de5... theme: Make the noise texture fancier
  15198fe... st-scroll-bar: use clutter_grab_pointer()
  03342c9... Introduce a new GrabHelper
  bcfe71e... popupMenu: Port to GrabHelper
  9c001ad... messageTray: Port to GrabHelper
  06114fd... messageTray: Don't care about the pointer's position
  550247e... messageTray: Use a Lightbox to shade the rest of the uiGrou