fix: manage clearing of current_action when action is interrupted (#584)

* fix: manage clearing of current_action when action is interrupted
* fix: repairs change_scene, add comments and new RC_INTERRUPTED code
* fix: manage ESC commands interruptions, even if running

addons/escoria-ui-keyboard-9verbs/game.gd

@@ -397,5 +397,6 @@ func _on_action_finished() -> void:
 	tooltip.clear()
 
 func _on_event_done(_return_code: int, _event_name: String):
-	escoria.action_manager.clear_current_action()
-	verbs_menu.unselect_actions()
+	if _return_code == ESCExecution.RC_OK:
+		escoria.action_manager.clear_current_action()
+		verbs_menu.unselect_actions()