Fix global position for `InputEventMouse` in `viewport::push_input`

Global position doesn't get adjusted within `InputEventMouse::xformed_by()`.

scene/main/viewport.cpp

@@ -1383,6 +1383,13 @@ Ref<InputEvent> Viewport::_make_input_local(const Ref<InputEvent> &ev) {
 	}
 
 	Transform2D ai = get_final_transform().affine_inverse();
+	Ref<InputEventMouse> me = ev;
+	if (me.is_valid()) {
+		me = me->xformed_by(ai);
+		// For InputEventMouse, the global position is not adjusted by ev->xformed_by() and needs to be set separately.
+		me->set_global_position(me->get_position());
+		return me;
+	}
 	return ev->xformed_by(ai);
 }