UI: Force current scene when using undo/redo

The undo/redo functions are setting the current scene. Everytime
it would do this, it would actually transition to the scene.
This forces the current scene, so it fixes a bug where the
transition would be grayed out when undoing/redoing.

UI/window-basic-transform.cpp

@@ -92,7 +92,7 @@ OBSBasicTransform::~OBSBasicTransform()
 		obs_source_t *source = obs_get_source_by_name(
 			obs_data_get_string(dat, "scene_name"));
 		reinterpret_cast<OBSBasic *>(App()->GetMainWindow())
-			->SetCurrentScene(source);
+			->SetCurrentScene(source, true);
 		obs_source_release(source);
 		obs_data_release(dat);
 		obs_scene_load_transform_states(data.c_str());