Attempt to fix initial window position on Windows.

Telegram/SourceFiles/window/window_controller.cpp

@@ -311,6 +311,10 @@ void Controller::showTermsDelete() {
 	}));
 }
 
+void Controller::firstShow() {
+	_widget.firstShow();
+}
+
 void Controller::finishFirstShow() {
 	_widget.finishFirstShow();
 	checkThemeEditor();