message: rename settings watcher refs in LeftPanel
diff: @@ -52,9 +52,9 @@ const LeftPanel = createReactClass({
  componentWillMount: function() {
  this.focusedElement = null;
  - this._settingWatchRef = SettingsStore.watchSetting(
  + this._breadcrumbsWatcherRef = SettingsStore.watchSetting(
  "breadcrumbs", null, this._onBreadcrumbsChanged);
  - this._settingWatchRef1 = SettingsStore.watchSetting(
  + this._tagPanelWatcherRef = SettingsStore.watchSetting(
  "TagPanel.enableTagPanel", null, () => this.forceUpdate());
  const useBreadcrumbs = !!SettingsStore.getValue("breadcrumbs");
  @@ -63,8 +63,8 @@ const LeftPanel = createReactClass({
  },
  componentWillUnmount: function() {
  - SettingsStore.unwatchSetting(this._settingWatchRef);
  - SettingsStore.unwatchSetting(this._settingWatchRef1);
  + SettingsStore.unwatchSetting(this._breadcrumbsWatcherRef);
  + SettingsStore.unwatchSetting(this._tagPanelWatcherRef);
  },
  shouldComponentUpdate: function(nextProps, nextState) {
  