[gtk] (8 commits) ...Merge branch 'matthiasc/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  81793b6... docs: Improve gtk_widget_set_font_map docs (*)
  3c62cd9... fontchooser: Handle families without faces (*)
  ee75bae... fontchooser: Make sure the tweak button is updated (*)
  1d34f95... filechooser: Fix gtk_file_chooser_set_choice (*)
  256f845... colorbutton: Fix handling of transient parents (*)
  d5e315c... gtk-demo: Improve the pickers demo (*)
  2c527ec... inspector: Make switches go back to normal size (*)
  3252d4c... Merge branch 'matthiasc/for-master' into 'master'

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