[gtk] (6 commits) Non-fast-forward update to branch wip/exalm/headerbar-title

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/headerbar-title' 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:

  7b953af... appchooserdialog: Create title and subtitle manually
  c9cb354... filechooserdialog: Create title and subtitle manually
  938c28d... headerbar: Remove subtitle
  c581c24... headerbar: Remove user-settable title
  83e1d33... headerbar: Rename custom-title to title-widget
  c30d32d... builder-tool: Rename GtkHeaderBar:custom-title to title-wid

Commits added to the branch:

  ac769be... appchooserdialog: Create title and subtitle manually
  aad6ac0... filechooserdialog: Create title and subtitle manually
  507609d... headerbar: Remove subtitle
  4ad6bdb... headerbar: Remove user-settable title
  b568eef... headerbar: Rename custom-title to title-widget
  8927cd5... builder-tool: Rename GtkHeaderBar:custom-title to title-wid