[gtk] (43 commits) Non-fast-forward update to branch kill-containers

[Matthias Clasen <matthiasc src gnome org>]

The branch 'kill-containers' 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:

  c753d7b... Avoid container api on grids
  6c8d83e... grid: Remove a test for grid container functionality
  8e4f6e9... grid: Derive from GtkWidget
  6768fe8... fixed: Add gtk_fixed_remove
  812f71d... Stop using container api on GtkFixed
  292dd86... fixed: Derive from GtkWidget
  7b45541... stack: Add gtk_stack_remove
  2107557... Don't use container api on GtkStack
  ce45335... shortcutssection: Stop using container api
  e9e9c80... shortcutswindow: Stop using container api
  d71f4c7... treepopover: Stop using container api
  c516576... stack: Derive from GtkWidget
  5fc097d... flowbox: Add gtk_flow_box_remove
  559e422... Stop using container api on GtkFlowBox
  fbc7da8... flowbox: Derive from GtkWidget
  ed47cb9... textview: Fix popover use
  e085fc9... text: Fix popover use
  945585c... textviewchild: Derive from GtkWidget
  aafe410... customlayout: Cosmetics
  5dd7697... buildable: Cosmetics
  cda97d9... listbox: Add gtk_list_box_remove
  027dfaa... Don't use container api on GtkListBox
  6898715... testsuite: Redo listbox sort test
  a6d8933... testsuite: Fix listbox tests
  bd46b0e... listbox: Derive from GtkWidget
  fb0d55e... headerbar: Add gtk_header_bar_remove
  622e5e2... Stop using container api on GtkHeaderBar
  e4a1b70... headerbar: Derive from GtkWidget
  ec19f32... Stop using container api on GtkNotebook
  8c013ac... notebook: Derive from GtkWidget
  d4dce79... box: Add gtk_box_append/prepend/remove
  c9e9550... Replace most remaining uses of container api
  a55764d... shortcutsgroup: Drop container bits
  83dd1fe... shortcutssection: Drop container bits
  3578302... dialog: Remove code that doesn't work anymore
  ab1ea39... assistant: Remove code that doesn't work anymore
  c4117ce... box: Derive from GtkWidget
  785dc77... Drop gtkcontainer.h includes
  e3d8fe2... testsuite: Drop a container api use
  8afb972... Drop GtkContainer and its accessible implementation
  046958f... dialog: Remove an unused struct
  b674040... dialog: Fix up handling of action widgets
  9453505... docs: Update migration guide

Commits added to the branch:

  2751223... Avoid container api on grids
  e4a9694... grid: Remove a test for grid container functionality
  0edb1b9... grid: Derive from GtkWidget
  46e9ff3... fixed: Add gtk_fixed_remove
  6c084cc... Stop using container api on GtkFixed
  7bf1a68... fixed: Derive from GtkWidget
  acf9e82... stack: Add gtk_stack_remove
  348725b... Don't use container api on GtkStack
  ddf1392... shortcutssection: Stop using container api
  209f589... shortcutswindow: Stop using container api
  0c22c43... treepopover: Stop using container api
  9966557... stack: Derive from GtkWidget
  164a8da... flowbox: Add gtk_flow_box_remove
  518a0b8... Stop using container api on GtkFlowBox
  73206f7... flowbox: Derive from GtkWidget
  77f1c1a... textview: Fix popover use
  e0af438... text: Fix popover use
  909150d... textviewchild: Derive from GtkWidget
  d279112... customlayout: Cosmetics
  bbd8671... buildable: Cosmetics
  dfb3d3f... listbox: Add gtk_list_box_remove
  7718247... Don't use container api on GtkListBox
  0712a77... testsuite: Redo listbox sort test
  a603b03... testsuite: Fix listbox tests
  57b371d... listbox: Derive from GtkWidget
  d53563c... headerbar: Add gtk_header_bar_remove
  50ddf26... Stop using container api on GtkHeaderBar
  476f910... headerbar: Derive from GtkWidget
  cd68de3... Stop using container api on GtkNotebook
  80669cf... notebook: Derive from GtkWidget
  ac16828... box: Add gtk_box_append/prepend/remove
  c0f4709... Replace most remaining uses of container api
  b192da7... shortcutsgroup: Drop container bits
  d004e4c... shortcutssection: Drop container bits
  7246fa0... dialog: Remove code that doesn't work anymore
  e6f530b... assistant: Remove code that doesn't work anymore
  825db39... box: Derive from GtkWidget
  6f9d299... Drop gtkcontainer.h includes
  add6266... testsuite: Drop a container api use
  29a694d... Drop GtkContainer and its accessible implementation
  3c844c6... dialog: Remove an unused struct
  c88dd67... dialog: Fix up handling of action widgets
  2db9cd0... docs: Update migration guide