[gtk] (17 commits) Non-fast-forward update to branch no-app-menu

[Matthias Clasen <matthiasc src gnome org>]

The branch 'no-app-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:

  cadc63d... gtk-demo: Stop using appmenu apis
  ccf76c4... examples: Stop using appmenu apis
  5b06dd6... inspector: Drop app-menu support
  be8b2e6... print-editor: Stop using appmenu apis
  5b6b85d... gtkapplication: Drop app menu support

Commits added to the branch:

  01df133... text: Avoid clash of preedit and placeholder (*)
  e60ea00... reftests: Fix the background-origin test (*)
  aec0a49... colorswatch: Remove a redundant include (*)
  78b427c... dragsource: Actually use the paintable (*)
  028bccc... gtk-demo: Use proper drag icons in the dnd demo (*)
  dff5986... main: Keep the target widget alive (*)
  965483e... gtk-demo: Reorganize the dnd demo (*)
  e54060b... gtk-demo: Fix entry position in dnd demo (*)
  d2f979f... gtk-demo: Improve drag icon handling in dnd example (*)
  7fac6b3... gtk-demo: Improve editing in the dnd demo (*)
  0f053d1... gtk-demo: Improve rotation in the dnd demo (*)
  962c4d6... Merge branch 'matthiasc/for-master' into 'master' (*)
  ca1c570... gtk-demo: Stop using appmenu apis
  6c31092... examples: Stop using appmenu apis
  a8df81b... inspector: Drop app-menu support
  d5da3b9... print-editor: Stop using appmenu apis
  79d6a77... gtkapplication: Drop app menu support

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