[gtk] (14 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:

  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
  b5c4a92... container: Reduce boilerplate

Commits added to the branch:

  6f7d9f9... A round of + removal (*)
  285293a... file chooser: Fix some compiler warnings (*)
  edbc991... searchbar: Fix a compiler warning (*)
  01447fc... print dialog: Stop using gtk_container_child_get
  1df7759... Remove testtitlebar
  9557607... Remove testactionbar
  37b7dc7... gtk-demo: Stop using child properties
  39952a9... notebook: Stop using child properties
  9fe6900... paned: Stop using child properties
  9bc85d4... testgtk: Stop using child properties
  4889d8d... builder-tool: Stop using child properties
  1e09ccb... Drop child property related apis
  1453a7b... container: Reduce boilerplate
  c105476... testsuite: Remove packing property tests

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