[gtk+] (21 commits) ...Merge bgo593793-filechooser-recent-folders-master branch.

[Federico Mena Quintero <federico src gnome org>]

Summary of changes:

  904ad66... Utility function to extract folders from the recently-used  (*)
  3146c79... Remove the expander in Save mode, and the configuration key (*)
  4353a5f... Get rid of the save_folder_combo (*)
  1ffd368... Put the pathbar in the 'Save in folder:' row in Save mode (*)
  252ace6... Start in recently-used mode when no folder is set (*)
  d64c88d... Actually highlight the 'recently used' and 'search' items i (*)
  5564df4... Remove unused struct field (*)
  e7196ee... Turn a struct field into a local variable (*)
  b90e121... Put recently-used folders in the recently-used list (*)
  064ff39... Instruct the user to pick a folder when nothing is selected (*)
  1af579b... Set the filename entry's base folder when a recent-folder i (*)
  ae42f28... Allow resolving absolute paths even if there is no base_fol (*)
  b442a3a... Return the recent-folder plus filename in Save mode from ge (*)
  4d9fdb1... Warn the user when he still needs to type a filename or cho (*)
  3b2e462... Move the pathbar creation to its own function (*)
  18ebec2... Create the recently-used widgets and infobar from the pathb (*)
  6bb34d7... Centralize the setting of the pathbar's widgets (*)
  894be79... Hide the Create Folder button in recent-files mode when the (*)
  9eb324d... No need to highlight the file's basename when setting the b (*)
  121f787... Update the docs with the policies for Save dialogs (*)
  b80fb88... Merge bgo593793-filechooser-recent-folders-master branch.

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