[SideMenu] Changing menu item attributes resets selectOnClick

[glebfox]

Case:

1. Set selectOnClick="true" for the SideMenu component

<sideMenu id="sideMenu"
          selectOnClick="true"
          width="100%"
          stylename="jmix-drawer-content"/>

2. Add ItemSelectListener that changes some menu item attributes, e.g. icon, stylename, etc.

@Subscribe
public void onInit(final InitEvent event) {
    sideMenu.addItemSelectListener(itemSelectEvent ->
            itemSelectEvent.getMenuItem().setStyleName(RandomStringUtils.randomAlphabetic(5)));
}

AR:
Section is reset, because SideMenu rebuilds the whole menu structure.

AR:
Selection is persists even if menu item attributes are changed.