code: function handleFileRename() {
          // Prefer selected sidebar item (which could be a folder)
          var entry = ProjectManager.getContext();
          if (!entry) {
              // Else use current file (not selected in ProjectManager if not visible in tree or workingset)
              entry = MainViewManager.getCurrentlyViewedFile();
          }
          if (entry) {
              ProjectManager.renameItemInline(entry);
          }
      }
docs: Show a textfield to rename whatever is currently selected in the sidebar (or current doc if nothing else selected)