Go to timestep for pre-excisting node if clicked

.gitmodules

@@ -18,4 +18,4 @@
 	url = https://github.com/OpenSpace/libtorrent.git
 [submodule "modules/dataloader/ext/nativefiledialog"]
 	path = modules/dataloader/ext/nativefiledialog
-	url = git@github.com:mlabbe/nativefiledialog.git
+	url = https://github.com/mlabbe/nativefiledialog.git

modules/dataloader/operators/loader.cpp

@@ -180,6 +180,7 @@ void Loader::loadDataItem(const std::string& absPathToItem) {
 
     if (scene()->sceneGraphNode(dirLeaf)) {
       LINFO(fmt::format("The sceneGraphNode {} has already been created!", std::string(dirLeaf)));
+      goToFirstTimeStep(absPathToItem);
       return;
     }