[gtk] (49 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:

  e4758e2... paned: Redo the api
  a26688a... infobar: Add gtk_info_bar_remove_action_widget
  ed6ff78... infobar: Add gtk_info_bar_add/remove_child
  6ef1450... Use gtk_info_bar_add_child throughout
  97dd039... infobar: Derive from GtkWidget
  2ebc2e5... grid: Add gtk_grid_remove
  11211e5... Avoid container api on grids
  34747e5... grid: Remove a test for grid container functionality
  0365d32... grid: Derive from GtkWidget
  bfab190... fixed: Add gtk_fixed_remove
  dbb7166... Stop using container api on GtkFixed
  e3065b9... fixed: Derive from GtkWidget
  50925d9... stack: Add gtk_stack_remove
  da5666b... Don't use container api on GtkStack
  4272e47... shortcutssection: Stop using container api
  b44f5c0... shortcutswindow: Stop using container api
  fce45a4... treepopover: Stop using container api
  fd6ed73... stack: Derive from GtkWidget
  eba030d... flowbox: Add gtk_flow_box_remove
  b440ca5... Stop using container api on GtkFlowBox
  c9ea51a... flowbox: Derive from GtkWidget
  520cbf1... textview: Fix popover use
  ea2afc1... text: Fix popover use
  75a2c34... textviewchild: Derive from GtkWidget
  c4683fb... customlayout: Cosmetics
  7099454... buildable: Cosmetics
  87b8e7d... listbox: Add gtk_list_box_remove
  94f4e14... Don't use container api on GtkListBox
  dfca51f... testsuite: Redo listbox sort test
  b846765... testsuite: Fix listbox tests
  94ede24... listbox: Derive from GtkWidget
  8b56fdf... headerbar: Add gtk_header_bar_remove
  04918ec... Stop using container api on GtkHeaderBar
  70f06b9... headerbar: Derive from GtkWidget
  1d8a3af... Stop using container api on GtkNotebook
  a4ea548... notebook: Derive from GtkWidget
  b1edfae... box: Add gtk_box_append/prepend/remove
  fb6bf8e... Replace most remaining uses of container api
  1d72df8... shortcutsgroup: Drop container bits
  19f34c4... shortcutssection: Drop container bits
  e322b8a... dialog: Remove code that doesn't work anymore
  022add4... assistant: Remove code that doesn't work anymore
  aa67b9f... box: Derive from GtkWidget
  e844a6c... Drop gtkcontainer.h includes
  c89f7ed... testsuite: Drop a container api use
  c6f38b1... Drop GtkContainer and its accessible implementation
  579b210... dialog: Remove an unused struct
  c4897b8... dialog: Firm up handling of action widgets
  29b1f46... docs: Update migration guide

Commits added to the branch:

  7170cad... paned: Redo the api
  fb19715... infobar: Add gtk_info_bar_remove_action_widget
  7ab4c85... infobar: Add gtk_info_bar_add/remove_child
  2fdb951... Use gtk_info_bar_add_child throughout
  6d7bddd... infobar: Derive from GtkWidget
  94f68f9... grid: Add gtk_grid_remove
  0829f56... Avoid container api on grids
  7633ac5... grid: Remove a test for grid container functionality
  bcd72cd... grid: Derive from GtkWidget
  4f06c94... fixed: Add gtk_fixed_remove
  7949837... Stop using container api on GtkFixed
  9ad6a5c... fixed: Derive from GtkWidget
  79c3812... stack: Add gtk_stack_remove
  8826e9b... Don't use container api on GtkStack
  5747534... shortcutssection: Stop using container api
  44acb2c... shortcutswindow: Stop using container api
  f84c820... treepopover: Stop using container api
  a084dfe... stack: Derive from GtkWidget
  2aa8475... flowbox: Add gtk_flow_box_remove
  0fd2a97... Stop using container api on GtkFlowBox
  64809cb... flowbox: Derive from GtkWidget
  d7ce884... textview: Fix popover use
  fd28451... text: Fix popover use
  45159ae... textviewchild: Derive from GtkWidget
  a150a6b... customlayout: Cosmetics
  36ae838... buildable: Cosmetics
  0d71bd6... listbox: Add gtk_list_box_remove
  7d872b8... Don't use container api on GtkListBox
  fcc00dc... testsuite: Redo listbox sort test
  dba89bb... testsuite: Fix listbox tests
  6c51bbb... listbox: Derive from GtkWidget
  531b0cf... headerbar: Add gtk_header_bar_remove
  a00b810... Stop using container api on GtkHeaderBar
  9ac5251... headerbar: Derive from GtkWidget
  308e9d3... Stop using container api on GtkNotebook
  a022576... notebook: Derive from GtkWidget
  26136f3... box: Add gtk_box_append/prepend/remove
  3e97a3f... Replace most remaining uses of container api
  433996a... shortcutsgroup: Drop container bits
  7952c5d... shortcutssection: Drop container bits
  e2eb125... dialog: Remove code that doesn't work anymore
  43cecfe... assistant: Remove code that doesn't work anymore
  658baf5... box: Derive from GtkWidget
  97bb697... Drop gtkcontainer.h includes
  88961ee... testsuite: Drop a container api use
  c56c7c7... Drop GtkContainer and its accessible implementation
  23f83e4... dialog: Remove an unused struct
  968508b... dialog: Firm up handling of action widgets
  c750592... docs: Update migration guide