[mutter] Created tag 3.38.4

[Florian Müllner <fmuellner src gnome org>]

The signed tag '3.38.4' was created.

Tagger: Florian Müllner <fmuellner gnome org>
Date: 1615837250 +0100

    Tag release 3.38.4

Changes since the last tag '3.38.3':

Carlos Garnacho (4):
      wayland: Make XDnD grab unlink source/offer manually
      wayland: Plug XDnD drag source leak
      wayland: Manually detach source/offer on failure paths
      wayland: Avoid automatically decoupling source/offer after grab

Florian Müllner (3):
      window: Do not handle ungrabbed events when unmanaging
      window: Guard can_ping() against unmanaging windows
      Bump version to 3.38.4

Jonas Ådahl (9):
      workspace: Downgrade assert to warning when adding window
      screen-cast-stream: Add getter for stream src
      screen-cast/monitor-stream: Don't fall apart when monitor changes
      screen-cast/area-src: Handle monitors changes here too
      window: Freeze stack when calculating showing state
      clutter/timeline: Clear stage view listener when actor destroyed
      clutter/stage-view: Disable double buffered shadow buffering
      compositor/x11: Notify the sync ring about frames on updates
      window-actor/x11: Queue full actor redraw when redraw queued

Olivier Fourdan (4):
      window-actor: Add a new can_freeze_commits() API
      window/x11: Check before freezing commits
      window: Add "is_focus_async" API
      core: Account for the globally active input case

Robert Mader (4):
      feedback-actor: Add API to set and get geometry scale
      wayland/dnd-surface: Use new API to set geometry scale of feedback actor
      compositor/dnd-actor: Take geometry scale into account on DnD-cancel
      wayland/subsurface: Move placement ops to the parents pending state

Sebastian Keller (1):
      frame: Fix crash when clicking below titlebar with broken gtk themes

Thomas Mühlbacher (3):
      monitor-config-store: Properly escape monitor spec
      monitor-config: Free `meta_monitor_spec` safely
      tests/monitor-config: Improve debugging output