Log Message:
Update xfwm4 to 4.13.1.

Release notes for 4.13.1
========================
[Please note that this is a development release.]

Adam Purkrt (3):
      Fix to erratic unmaximization by dragging
      Keep grip in proportion
      Typo in clientMoveTile

Andre Miranda (2):
      I18n: Update translation pt_BR (100%).
      Fix memory leaks in tabwin

Andrey Alekseenkov (1):
      Fix logic error in bottom struts validation

Błażej Szczygieł (1):
      compositor: remove old vblank code

David Siroky (1):
      Raise window while cycling

Marcel Partap (1):
      Do not prevent ALT+Mouse resizing for borderless maximized
windows.

Olivier Fourdan (38):
      Post release tag bump.
      netwm: avoid spurious warning on restart
      placement: Use primary monitor as default
      Revert "Add PointerMotionHintMask"
      Use ximerama indices for _NET_WM_FULLSCREEN_MONITORS
      Fix typo in flag name
      Flush display to catch possible errors
      compositor: update presentproto requirement
      compositor: Remove vblank option
      compositor: Remove present env var
      screen: Fix broken monitor index
      compositor: Disable XPresent on error
      compositor: check XPresent before GLX
      Fix maximized size increment regression
      main: Only allow for the x11 gdk backend
      compositor: add command line option for vblank
      compositor: fix clipping region with zooming
      client: Make sure to redraw when removing maximized
      screen: Use computed screen size instead of xlib
      main: keep xfwm4_error_quark private
      display: Fix warning in trace message
      stacking: Raise ancestor on activate if different from window
      pixmap: Avoid warning without icon
      stacking: Raise on activate w/out click-to-focus
      Build: Fix warnings with newer gtk+
      trace: rework traces
      build: Fix warnings and errors
      display: Add convenient display functions
      Use convenient display functions
      compositor: avoid damage errors
      compositor: Do not repaint if region is empty
      compositor: Print the GL renderer used
      compositor: Skip ARGB10 GLX configs
      netwm: Fix adding maximized state
      client: Check when GTK_FRAME_EXTENTS has changed
      client: Check GTK_HIDE_TITLEBAR_WHEN_MAXIMIZED
      compositor: Add support for NET_WM_BYPASS_COMPOSITOR
      Release 4.13.1!

P. Pronk (1):
      client: Maximize on expected output

Stephane Gourichon (1):
      Fix build out of tree

Unit 193 (1):
      Fix a spelling mistake.

Viktor Odintsev (32):
      Prepare to GTK3
      Port most of GUI stuff to GTK3
      Implement RangeDebouncer
      Implement a new DND separator
      Replace inline pixbuf with gresource
      Handle gtk_screen_width/height deprecation
      Handle gtk_button_set_alignment deprecation
      Introduce xfwm-common static library
      Load default icon from icon theme
      Handle GDK display/screen/monitor deprecations
      Remove deprecated gdk_screen_make_display_name
      Replace gdk_error_trap_pop with gdk_error_trap_pop_ignored
      icons: replace gdk_pixbuf_get_from_drawable with gdk_pixbuf_get_from_surface
      Remove usage of deprecated macroses and private fields
      icons: use cairo-xlib-xrender to draw window's preview
      Remove black_gc and white_gc
      Implement GTK2-like style calculator
      Implement cairo drawing
      tabwin: complete GTK3 port, add CSS support
      poswin: remove deprecations
      Fix remaining deprecations
      compositor: fix possible infinite loop
      events: replace client_event with event filter
      Fix compilation with --disable-compositor
      menu: remove deprecations
      client: remove X error traps
      tabwin: fix initial sizing
      Add xfconf 4.13 support
      main: add support for multiple screens with GDK 3
      Fix some build warnings
      device: Implement XI2 event handling
      Replace XEvent with XfwmEvent + add xfwm_device_* grabs usage