First part of file chooser fixes.

First part of file chooser fixes.

2006-09-02  Kristian Rietveld  <kris@imendio.com>

	First part of file chooser fixes.

	* gtk/gtkfilechooserbutton.c (model_add_special): also set the
	handle in the model for the desktopdir case.

	* gtk/gtkfilechooserdefault.c (shortcuts_add_current_folder): free
	volume in case we retrieved it but don't pass it on to insert_path,
	(shortcuts_model_create): change the column type for the handles
	to pointer instead of GObject so our handle ref counting is not
	disturbed,
	(show_and_select_paths_finished_loading): don't forget to unref
	the dialog.

	* gtk/gtkfilesystemunix.c (gtk_file_system_unix_class_init),
	(gtk_file_system_unix_init), (gtk_file_system_unix_dispose):
	remove pending execute_callbacks_idle during dispose, also
	execute all callbacks waiting to be run in the next idle,
	(queue_*callback), (execute_callbacks_idle): refactor to maintain
	a list of callbacks to call per file system instead of globally,
	guard the file system during callback invocation,
	(gtk_file_system_unix_get_folder): only add load folder idle if
	none has been added yet.