fixing archive remove issue (#227)

* fixing archive remove issue

* improving efficiency

Author: robertpatrick

webui/src/js/utils/wdt-archive-helper.js

@@ -171,11 +171,13 @@ define(['knockout', 'models/wkt-project', 'utils/wkt-logger'],
           if (node.children) {
             const result = this._removeFromArchiveModel(archivePath, node.children, deleteEmptyParents);
             wktLogger.debug('nested call from node %s returned %s', node.id, result);
-            if (deleteEmptyParents && result && node.children().length === 0) {
-              wktLogger.debug('removing node %s from parent children list', node.id);
-              this._removeNodeFromNodesObservable(nodesObservable, node);
+            if (result) {
+              if (deleteEmptyParents && node.children().length === 0) {
+                wktLogger.debug('removing node %s from parent children list', node.id);
+                this._removeNodeFromNodesObservable(nodesObservable, node);
+              }
+              return result;
             }
-            return result;
           }
         }
         return false;