ProjectNodes: Fix forEachGenericNode

Iterate over all nodes in the whole tree, not just the FileNodes
of the children of the current node.

Change-Id: Ib8bf0eaecb2b13bd01dbc61417b83d0873ab6527
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/projectexplorer/projectnodes.cpp

@@ -470,7 +470,7 @@ void FolderNode::forEachGenericNode(const std::function<void(Node *)> &genericTa
     for (Node *n : m_nodes) {
         genericTask(n);
         if (FolderNode *fn = n->asFolderNode())
-            fn->forEachNode(genericTask);
+            fn->forEachGenericNode(genericTask);
     }
 }