[mutter] (32 commits) Created branch wip/carlosg/xwayland-on-demand

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/xwayland-on-demand' was created.

Summary of new commits:

  2431ebe... x11: Add X11 selection input/output streams
  530bc3e... core: Add MetaSelection and MetaSelectionSource
  882bec8... x11: Add X11 MetaSelectionSource implementation
  0bd711e... wayland: Add wayland MetaSelectionSource implementation
  46db68c... core: Set up MetaSelection on MetaDisplay
  469def5... x11: Add X11 selection management
  517d977... core: Add memory-based selection source
  250db4f... core: Add clipboard manager
  e6d0879... wayland: Integrate with MetaSelection
  37b5cfc... wayland: Reduce MetaXWaylandSelection to just DnD
  8cfba8e... Make MetaSelection, MetaSelectionSource and MetaMemorySelec
  376ed4b... core: Add MetaSound abstraction
  20eea90... core: Make MetaBell use MetaSound to play the bell sound
  a03c6f8... x11: Make error trap API NULL safe
  d11c8a9... x11: Move focus sentinel to MetaX11Display
  672240d... core: Do not synchronize stack with Xserver if there is no 
  26628cc... core: Avoid grab transfer shenanigans with non-X11 backend
  511846e... core: Separate checks for pointer barriers availability
  465a3fc... x11: Move X11 calls to map/unmap a MetaWindow to MetaWindow
  6782ab4... core: Relax requirement that MetaWindow shall have icon/min
  4cb36f8... x11: Separate X11 focus handling into MetaX11Display method
  9ec54eb... x11: Split X11 focus change requests to a separate function
  a011291... core: Untangle input focus management
  2375dc0... core: Add explicit init/shutdown_x11() MetaDisplay calls
  37299d8... x11: Unmanage X11 windows on MetaX11Display finalization
  8e4ca38... x11: Initialize GdkDisplay together with MetaX11Display
  01c03a0... wayland: Split Xwayland initialization in 2 steps
  76051ed... x11: protect against null MetaX11Display when looking up X1
  a89628b... sm focus shuffling
  daaca2c... x11: Add method to launch applications, using SnLauncher
  509af95... core: Add MetaLaunchContext
  242094b... wayland: Launch Xwayland on demand