nodes: use flag instead of hidden array in factory

app/node/factory.cpp

@@ -65,8 +65,8 @@
 #include "time/timeremap/timeremap.h"
 
 namespace olive {
+
 QList<Node*> NodeFactory::library_;
-QVector<int> NodeFactory::hidden_;
 
 void NodeFactory::Initialize()
 {
@@ -78,10 +78,6 @@ void NodeFactory::Initialize()
 
     library_.append(created_node);
   }
-
-  hidden_.append(kTextGeneratorV1);
-  hidden_.append(kTextGeneratorV2);
-  hidden_.append(kGroupNode);
 }
 
 void NodeFactory::Destroy()
@@ -107,8 +103,7 @@ Menu *NodeFactory::CreateMenu(QWidget* parent, bool create_none_item, Node::Cate
       continue;
     }
 
-    if (hidden_.contains(i)) {
-      // Skip this node
+    if (n->GetFlags() & Node::kDontShowInCreateMenu) {
       continue;
     }