TabSet inside Tab in 0.5.0 release

[dotansimha]

Hi,

trying to add TabSet inside a tab, something like this:

<tabset>
    <tab heading="Tab1">Content</tab>
    <tab heading="Tab2">
        <tabset>
            <tab heading="Sub-Tab1">Content</tab>
            <tab heading="Sub-Tab2">Content</tab>
        </tabset>
    </tab>
</tabset>

Result is an error:

TypeError: Cannot read property '$parent' of undefined

I saw that plunker works (version is 0.4.0):
http://plnkr.co/edit/3wAezw6HbHHAOaIjc9pB?p=preview

but with 0.5.0 its causes this error.

Thanks!

[pkozlowski-opensource]

Duplicate of #783