code: public static void openFavoriteDialog(CmsFileExplorer explorer) {
  
          try {
              CmsExplorerFavoriteContext context = new CmsExplorerFavoriteContext(A_CmsUI.getCmsObject(), explorer);
              CmsFavoriteDialog dialog = new CmsFavoriteDialog(context, new CmsFavoriteDAO(A_CmsUI.getCmsObject()));
              Window window = CmsBasicDialog.prepareWindow(DialogWidth.max);
              window.setContent(dialog);
              window.setCaption(CmsVaadinUtils.getMessageText(org.opencms.ui.Messages.GUI_FAVORITES_DIALOG_TITLE_0));
              A_CmsUI.get().addWindow(window);
              window.center();
          } catch (CmsException e) {
              CmsErrorDialog.showErrorDialog(e);
          }
      }
docs: Opens the favorite dialog.
  
  @param explorer the explorer instance (null if not currently in explorer)