[gtk] (17 commits) Non-fast-forward update to branch wip/ricotz/mediafile

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/ricotz/mediafile' 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:

  eeb8dbb... mediafile: Use correct return-type for factory methods

Commits added to the branch:

  3fcd39f... docs: Add GtkNative to types (*)
  ca3d855... levelbar: Use a bin layout (*)
  29244c5... video: Use a bin layout (*)
  991f4ed... menubar: Use a box layout (*)
  8122156... scrolledwindow: Remove set_placement_internal() (*)
  ea1ff9c... filechooserbutton: Remove an outdated comment (*)
  12438b3... filechooserbutton: Remove priv->child (*)
  d032396... filechooserbutton: Add icon to default (None) combo box ite (*)
  5d8c8f3... dialog: Remove useless gtk_widget_show() call (*)
  387587d... colorbutton: Use a bin layout (*)
  1b4bce4... fontchooserwidget: Use a bin layout (*)
  e05b87c... gl renderer: Fix rounded rect intersection (*)
  413cfed... searchentry: Use edit-clear-all-symbolic as clear icon (*)
  43f2b47... searchentry: Use a box layout (*)
  78a376a... snapshot: Try to avoid some linear gradient nodes (*)
  7ce1055... eventcontrollerscroll: Events are unhandled by default (*)
  0ad4166... mediafile: Add g-i annotations for actual return-type of fa

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