Keep track of focus position

Common/UI/Screen.cpp

@@ -191,6 +191,13 @@ void ScreenManager::render() {
 	processFinishDialog();
 }
 
+void ScreenManager::getFocusPosition(float &x, float &y, float &z) {
+	UI::View *v = UI::GetFocusedView();
+	x = v ? v->GetBounds().x : 0;
+	y = v ? v->GetBounds().y : 0;
+	z = stack_.size();
+}
+
 void ScreenManager::sendMessage(const char *msg, const char *value) {
 	if (!strcmp(msg, "recreateviews"))
 		RecreateAllViews();