code: @UiChild(limit = 1, tagname = "buttonActivePersist")
      public void addActivePersist(final JQMButton button) {
          if (button == null) return;
          addActive(button);
          button.getElement().addClassName("ui-state-persist");
      }
docs: Restore the button's active state each time the page is shown while it exists in the DOM.