* thunar/thunar-dialogs.c, thunar/thunar-window.{c,h}: Move the generic
	  parts of the about dialog to thunar-dialogs.c.
	* thunar/thunar-properties-dialog.c
	  (thunar_properties_dialog_update_providers): Fix missing
	  gtk_widget_show() for the provided pages.




(Old svn revision: 20524)