implemented saving/loading for groups

app/node/factory.cpp

@@ -54,6 +54,7 @@
 
 namespace olive {
 QList<Node*> NodeFactory::library_;
+QVector<int> NodeFactory::hidden_;
 
 void NodeFactory::Initialize()
 {
@@ -65,6 +66,9 @@ void NodeFactory::Initialize()
 
     library_.append(created_node);
   }
+
+  hidden_.append(kTextGeneratorLegacy);
+  hidden_.append(kGroupNode);
 }
 
 void NodeFactory::Destroy()
@@ -86,6 +90,11 @@ Menu *NodeFactory::CreateMenu(QWidget* parent, bool create_none_item, Node::Cate
       continue;
     }
 
+    if (hidden_.contains(i)) {
+      // Skip this node
+      continue;
+    }
+
     // Make sure nodes are up-to-date with the current translation
     n->Retranslate();
 
@@ -241,6 +250,8 @@ Node *NodeFactory::CreateFromFactoryIndex(const NodeFactory::InternalID &id)
     return new SubtitleBlock();
   case kShapeGenerator:
     return new ShapeNode();
+  case kGroupNode:
+    return new NodeGroup();
 
   case kInternalNodeCount:
     break;