+ pb_cui_sig = 111,
+ pb_pmenu_sig = 222,
+ pb_item_sig = 333,
+ pb_boot_editor_sig = 444,
+ pb_text_screen_sig = 555,
+ pb_config_screen_sig = 666,
+ pb_lang_screen_sig = 777,
+ pb_add_url_screen_sig = 888,
+ pb_subset_screen_sig = 101,
+ pb_removed_sig = -999,