code: function _addListeners() {
          // Avoid adding duplicate listeners - e.g. if a 2nd search is run without closing the old results panel first
          _removeListeners();
  
          DocumentModule.on("documentChange", _documentChangeHandler);
          FileSystem.on("change", _debouncedFileSystemChangeHandler);
          DocumentManager.on("fileNameChange",  _fileNameChangeHandler);
      }
docs: Add listeners to track events that might change the search result set