message: fix maturity rating not setting the selected rating
diff: <translate>dash.games.maturity.wip_help</translate>
  </p>
  + <!-- skip the first element, it's a placeholder for unrated maturity that shouldn't be selectable -->
  <div class="radio" v-for="(item, index) in age.slice(1)" :key="index">
  <label>
  - <app-form-control-radio :value="index" />
  + <app-form-control-radio :value="index + 1" />
  {{ item.label }}
  <span v-if="item.description" class="help-inline">- {{ item.description }}</span>
  </label>
  