[gtk] (14 commits) Non-fast-forward update to branch bin-removal

[Matthias Clasen <matthiasc src gnome org>]

The branch 'bin-removal' 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:

  d3210fd... frame: Add a child property
  2c5f033... Use gtk_frame_set_child throughout
  c7a97b1... frame: Derive from GtkWidget
  139807d... aspectframe: Add a child property
  b8153fb... Use gtk_aspect_frame_set_child throughout
  4ed319c... aspectframe: Derive from GtkWidget
  a42ca9c... viewport: Add a child property
  e6031a4... Use gtk_viewport_set_child throughout
  a44aec3... viewport: Derive from GtkWidget
  8af427f... builder-tool: Convert former bin children
  7c75fe3... Add a test for bin child conversion

Commits added to the branch:

  9b0b6bf... frame: Add a child property
  86f340c... Use gtk_frame_set_child throughout
  5dbac8c... frame: Derive from GtkWidget
  5d79faa... aspectframe: Add a child property
  f4be859... Use gtk_aspect_frame_set_child throughout
  9173971... aspectframe: Derive from GtkWidget
  4bd53da... viewport: Add a child property
  613d9c1... Use gtk_viewport_set_child throughout
  2591cc5... viewport: Derive from GtkWidget
  e0623e5... popover: Add a child property
  14f9d1e... Use gtk_popover_set_child throughout
  5134df7... popover: Derive from GtkWidget
  7b0431c... builder-tool: Convert former bin children
  74e2359... Add a test for bin child conversion