[gtk] (10 commits) Non-fast-forward update to branch issue-1961

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'issue-1961' 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:

  1475097... Add private getter for a monitor connector
  a4aedf0... Fix regression in GdkScreen.get_monitor_plug_name()
  adde459... Relay the xdg_output.name to GdkMonitor
  fae9e7b... Set the monitor's connector under X11

Commits added to the branch:

  08f216e... action muxer: Fix gtk_widget_get_action_group (*)
  cc282c0... Fix build with older GLib (*)
  44a2d5d... Skip a11y tests (*)
  17ec9ee... Merge branch 'fix-action-muxer-parent-chain' into 'gtk-3-24 (*)
  c6b16fb... FileChooserButton: Document the CSS nodes & class (*)
  4119578... Overlay: Document overlay children aren't measured (*)
  af778ec... Add private getter for a monitor connector
  cdd6fb3... Fix regression in GdkScreen.get_monitor_plug_name()
  8e08721... Relay the xdg_output.name to GdkMonitor
  5b54f86... Set the monitor's connector under X11

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