[gtk] (7 commits) Non-fast-forward update to branch x11-dnd-fixes

[Matthias Clasen <matthiasc src gnome org>]

The branch 'x11-dnd-fixes' 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:

  bd131f0... x11: Avoid crashes in dnd
  3255526... x11: Keep a ref on GdkDrag objects
  c91730c... x11: Fix dnd coordinate handling
  bdb5f03... Add detail to gdk_drag_begin docs

Commits added to the branch:

  71323a8... wayland/popup: Remove unnecessary checks when mapping popup (*)
  f0b0076... wayland/popup: Emit un-withdrawn event earlier (*)
  7edfcc3... Merge branch 'wip/wayland-fix-popup-grabs' into 'master' (*)
  833b564... x11: Avoid crashes in dnd
  f93d0f8... x11: Keep a ref on GdkDrag objects
  6a984a7... x11: Fix dnd coordinate handling
  d7771f3... Add detail to gdk_drag_begin docs

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