[gtk] (52 commits) Non-fast-forward update to branch kill-tree-menu

[Matthias Clasen <matthiasc src gnome org>]

The branch 'kill-tree-menu' 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:

  d9068ef... filechooserbutton: Be smarter about 'None'
  43b184a... combobox: Replace GtkTreeMenu with a popover

Commits added to the branch:

  267d5ae... Update Polish translation (*)
  7c6e620... Fixes to Catalan translation (*)
  e999016... Update Galician translation (*)
  6b89d8a... inspector: Add a focus overlay (*)
  28b91a4... modelbutton: Be focusable (*)
  9543a5d... popovermenu: Fix keynav with submenus (*)
  e139965... popovermenu: Use a weak ref for active item
  86de53d... popovermenubar: Cosmetics
  f17f00f... window: Complete the popover conversion
  de6ec4c... filechooserbutton: Be smarter about 'None'
  dfd76e6... mountoperation: Use a popover
  ef6dae8... placesview: Use a popover
  ca3c911... appchooserwidget: Remove ::populate-popup
  fa0c867... notebook: Remove menu remnants
  3181a5f... applicationwindow: Stop using a menu bar
  bf7fb2c... docs: Stop taking menubar screenshots
  4abd9ee... toolbar: Simplify overflow implementation
  9d634f9... menutoolbutton: Fix sensitivity handling
  4d91ebe... window: Move F10 handling to popover menubars
  d6eacd8... accellabel: Remove an example using menus
  7474687... docs: Avoid using a menu for an example
  1e4e63b... gtk-demo: Replace a menu with a popover
  ac8d0a3... gtk-demo: Use a popover in the clipboard demo
  464089f... gtk-demo: Remove a somewhat silly bit of code
  54711d1... gtk-demo: Convert the dnd demo to a popover
  61361ec... gtk-demo: Remove the menus demo
  da6c133... gtk-demo: Cosmetics
  ae01b8d... gtk-demo: Remove menus from listbox demo
  0f4a6ab... gtk-demo: Convert the builder demo to a menu model
  66390cc... gtk-demo: Remove the change display demo
  8b1a8ef... widget-factory: Remove the menubar
  c17b0d5... combobox: Replace GtkTreeMenu with a popover
  8c39214... headerbar: Stop using GtkMenuButton::use-popover
  7baa8da... menutoolbutton: Stop supporting menus
  a177ea3... menubutton: Stop supporting menus
  d12555b... testsuite: Cosmetic change
  0031c71... testsuite: Remove menu tests
  d9401f8... testsuite: Remove menu special-casing
  61d21b1... tests: Stop using menus
  996a2f6... label: Remove menu support code
  b036d8e... widget: Remove menu special-casing
  7d12dc7... inspector: Remove menu special-casing
  a830a8f... buildertool: Drop menu properties
  3400527... docs: Remove menu bars from the visual index
  4bae2b8... label: Stop referring to GtkMenuItem in the docs
  75f0338... accellabel: Don't mention GtkMenuItem in the docs
  cc43254... docs: Remove mentions of GtkMenuItem
  ff31962... doc: Build fixes
  cda6ee3... gtk: Remove menu code
  a70cc71... accelcellrenderer: Fix editing
  6ace7c3... accelcellrenderer: Stop grabbing
  1729251... Remove gdk_seat_grab

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