code: function endTraversal() {
          var pane = _getPane(ACTIVE_PANE);
  
          if (_traversingFileList) {
              _traversingFileList = false;
  
              _makeFileMostRecent(pane.id, pane.getCurrentlyViewedFile());
          }
      }
docs: Un-freezes the MRU list after one or more beginTraversal() calls.
  Whatever file is current is bumped to the front of the MRU list.