[gtk] (14 commits) ...Merge branch 'matthiasc/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  ec21d35... gsk: doc fixups (*)
  6bd9ce7... docs: Ignore more generated Wayland protocol headers (*)
  da51418... gl renderer: Make minimal rounded rects more minimal (*)
  5f4beb7... widgetprivate: Remove unused function (*)
  2d43ecf... widget: root child before emitting child observer signals (*)
  e3ff92b... shortcutcontroller: Save signal handler ID (*)
  d663909... shortcutcontroller: Use priv->shortcuts directly in set_wid (*)
  8645773... shortcutcontroller: Pass the muxer to update_accel() (*)
  1d6c6fc... shortcutcontroller: Separate trigger/action early returns (*)
  aefabcc... popovermenu: Pull variable declaration in closest scope (*)
  ff8de0a... eventcontrollermotion: Notify by pspec (*)
  af28237... popovermenu: Connect to right controller signal (*)
  dc13ff9... modelbutton: Reset active menu item on pointer leave (*)
  61e7326... Merge branch 'matthiasc/for-master' into 'master'

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