[gtk] (12 commits) Non-fast-forward update to branch child-properties-be-gone

[Matthias Clasen <matthiasc src gnome org>]

The branch 'child-properties-be-gone' 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:

  8d26501... print dialog: Stop using gtk_container_child_get
  2d2678f... file chooser: Fix some compiler warnings
  0859069... Remove testtitlebar
  a584c88... Remove testactionbar
  fa2a58a... gtk-demo: Stop using child properties
  1996586... notebook: Stop using child properties
  736ad5d... paned: Stop using child properties
  73f6ad0... testgtk: Stop using child properties
  317b3f1... builder-tool: Stop using child properties
  eb15fbf... Drop child property related apis
  1158f80... fixup widget
  ea50692... searchbar: Fix a compiler warning
  760f10d... fixup conainer
  24bda9e... container: Reduce boilerplate

Commits added to the branch:

  41aab92... file chooser: Fix some compiler warnings
  a35f56a... searchbar: Fix a compiler warning
  24059b6... print dialog: Stop using gtk_container_child_get
  feab8db... Remove testtitlebar
  3a17ba0... Remove testactionbar
  1c6c3ca... gtk-demo: Stop using child properties
  ae05795... notebook: Stop using child properties
  1c36b19... paned: Stop using child properties
  804d5b1... testgtk: Stop using child properties
  8d0cd22... builder-tool: Stop using child properties
  67c198d... Drop child property related apis
  cac7d36... container: Reduce boilerplate