Fix missing binding for NOTIFICATION_WM_POSITION_CHANGED

Author: Hilderin

doc/classes/Node.xml

@@ -1226,6 +1226,9 @@
 		<constant name="NOTIFICATION_VP_MOUSE_EXIT" value="1011">
 			Notification received when the mouse cursor leaves the [Viewport]'s visible area, that is not occluded behind other [Control]s or [Window]s, provided its [member Viewport.gui_disable_input] is [code]false[/code] and regardless if it's currently focused or not.
 		</constant>
+		<constant name="NOTIFICATION_WM_POSITION_CHANGED" value="1012">
+			Notification received when the window is moved.
+		</constant>
 		<constant name="NOTIFICATION_OS_MEMORY_WARNING" value="2009">
 			Notification received from the OS when the application is exceeding its allocated memory.
 			Implemented only on iOS.

scene/main/node.cpp

@@ -3811,6 +3811,7 @@ void Node::_bind_methods() {
 	BIND_CONSTANT(NOTIFICATION_WM_DPI_CHANGE);
 	BIND_CONSTANT(NOTIFICATION_VP_MOUSE_ENTER);
 	BIND_CONSTANT(NOTIFICATION_VP_MOUSE_EXIT);
+	BIND_CONSTANT(NOTIFICATION_WM_POSITION_CHANGED);
 	BIND_CONSTANT(NOTIFICATION_OS_MEMORY_WARNING);
 	BIND_CONSTANT(NOTIFICATION_TRANSLATION_CHANGED);
 	BIND_CONSTANT(NOTIFICATION_WM_ABOUT);