Comment 2 for bug 1539635

The component used in webbrowser-app is entirely custom (see https://bazaar.launchpad.net/~phablet-team/webbrowser-app/trunk/view/head:/src/app/webbrowser/TabsBar.qml).

The design team is currently playing with the idea of making it a generic tabs component that other apps could use, and that would be made available as part of the UI toolkit.

Adding an ubuntu-ux task so they can comment on the status of the experiment.