Dual bookmark backup files with user notification, auto-recovery and bail; save top level branch expand states

src/util/DataTree.cpp

@@ -561,6 +561,8 @@ DataNode *DataNode::newChildCloneFrom(const char *name_in, DataNode *cloneFrom)
         cloneNode->newChildCloneFrom(cNode->getName().c_str(), cNode);
     }
     
+    cloneFrom->rewind();
+    
     return children.back();
 }