Right now, content assist for CSS classes works only for standart HTML tags. But some frameworks use custom html tags (AngularJS and its extensions like ionic framework for example). It would be useful if our CSS content assist also worked for such tags.
For example:

<ion-tabs class="tabs-positive tabs-icon-only">
  <ion-tab title="Home" icon-on="ion-ios7-filing" icon-off="ion-ios7-filing-outline">
  </ion-tab>
</ion-tabs>

Currently the content assis works only if you change <ion-tabs> to <div> or any other standart HTML tags.