meta_display_list_windows: Exclude override-redirect

Don't include override-redirect windows in the list return by
meta_display_list_windows(), since we almost never want to handle
them when considering "all window" for the display. Add a separate
meta_display_list_all_windows() that includes override-redirect
windows.

http://bugzilla.gnome.org/show_bug.cgi?id=582639

src/core/delete.c

@@ -253,7 +253,7 @@ meta_window_present_delete_dialog (MetaWindow *window, guint32 timestamp)
        * mutter-dialog
        */
       
-      windows = meta_display_list_windows (window->display);
+      windows = meta_display_list_windows (window->display, META_LIST_DEFAULT);
       tmp = windows;
       while (tmp != NULL)
         {