[gtk] (5 commits) Non-fast-forward update to branch wip/otte/win32-cleanup

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/win32-cleanup' 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:

  4b697f2... ngl: Turn off depth test
  97974f3... gl: Disable depth test
  832537a... win32: Remove _gdk_offset_x and _gdk_offset_y
  e8fe248... win32: Remove local dnd
  be05b38... win32: Store the window classes in the display
  0611156... win32: Use GWL_USERDATA instead of a global hash table

Commits added to the branch:

  efbad0b... ngl: Turn off depth test
  98424bd... win32: Remove _gdk_offset_x and _gdk_offset_y
  6b760b5... win32: Remove local dnd
  0d6becd... win32: Store the window classes in the display
  c1f1a1a... win32: Use GWL_USERDATA instead of a global hash table