Fix wrong close_window event

classes/window/main_window.xml

@@ -293,7 +293,7 @@
                         </state>
 
                         <state id="waiting">
-                            <transition event="close_window" target="../../idle">
+                            <transition event="window_close" target="../../idle">
                                 <raise event="delete_instance" scope="cd">
                                     <parameter expr="self.process_enactor"/>
                                 </raise>