Add lable for "ix-menu-about" inside menu

[marvingreeven]

Suggestion / feature request

Right now the property "label" at the "ix-menu-about" item just sets the label at the top.
The label inside the menu is not affected.

[danielleroux]

@marvingreeven Currently you have to provide the about item label inside the ix-menu

<ix-menu i18nLegal="{{ '~086e3 About and Legal Information' | translate }}">
        <ix-menu-about>
          <ix-menu-about-item label="Tab 1">Content 1</ix-menu-about-item>
          <ix-menu-about-item label="Tab 2">Content 2</ix-menu-about-item>
        </ix-menu-about>
</ix-menu>