code: private void rebuildSimpleTab() {
  
          m_form.removeGroup(CmsPropertyPanel.TAB_SIMPLE);
          CmsPropertyPanel panel = ((CmsPropertyPanel)m_form.getWidget());
          panel.clearTab(CmsPropertyPanel.TAB_SIMPLE);
          if (m_handler.hasEditableName()) {
              m_form.addField(CmsPropertyPanel.TAB_SIMPLE, createUrlNameField());
          }
          internalBuildConfiguredFields();
          m_form.renderGroup(CmsPropertyPanel.TAB_SIMPLE);
      }
docs: Rebuilds the simple tab.<p>