[gnome-shell] (4 commits) Non-fast-forward update to branch wip/carlosg/grabs-pt3

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/grabs-pt3' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  70bd737... js: Change main.pushModal to return the Clutter.Grab handle
  960ca06... appDisplay: Drop grabHelper.addActor() call
  09ad35f... grabHelper: Drop addActor/removeActor calls
  21505fc... shell: Drop shell_global_begin/end_modal()

Commits added to the branch:

  97abb0c... js: Change main.pushModal to return the Clutter.Grab handle (*)
  1dcdf27... appDisplay: Drop grabHelper.addActor() call
  5952a07... grabHelper: Drop addActor/removeActor calls
  e165911... shell: Drop shell_global_begin/end_modal()

(*) This commit already existed in another branch; no separate mail sent