Allow switching to already active scene if in studio mode

Preview and program scene can differ in regards to the active scene
items.
Thus it can make sense to switch to the already active scene.

src/macro-action-scene-switch.cpp

@@ -39,7 +39,8 @@ bool MacroActionSwitchScene::PerformAction()
 {
 	auto scene = _scene.GetScene();
 	switchScene({scene, _transition.GetTransition(),
-		     (int)(_duration.seconds * 1000)});
+		     (int)(_duration.seconds * 1000)},
+		    obs_frontend_preview_program_mode_active());
 	if (_blockUntilTransitionDone && scene) {
 		waitForTransitionChange(scene);
 		return !switcher->abortMacroWait;