[gnome-shell] (18 commits) Created branch wip/message-tray

[Debarshi Ray <debarshir src gnome org>]

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

Summary of new commits:

  260b18b... messageTray: Add a toggle-message-tray keybinding to toggle
  9858879... messageTray: Clone, clip & move the window_group when tray 
  948eca8... messageTray: restyle the message tray
  2b1da05... theme: Use the proper syntax for background-repeat
  545c1a6... theme: Update theme
  54d5b75... messageTray: Clean up code
  9c524ba... messageTray: Use the standard :hover pseudo-class
  776ec2f... messageTray: don't time out banners when the user is inacti
  be43487... messageTray: don't show the tray after new items are added
  e6082ae... message-tray: Add :overview pseudo class when in overview
  7ae68cd... theme: Update message-tray style in the overview
  693266c... theme: Make the noise texture fancier
  d2195ec... st-scroll-bar: use clutter_grab_pointer()
  f43e5cb... Introduce a new GrabHelper
  2416cc4... popupMenu: Port to GrabHelper
  9af1a60... messageTray: Port to GrabHelper
  24bb2ca... messageTray: Don't care about the pointer's position
  85d55ef... messageTray: Use a Lightbox to shade the rest of the uiGrou