Tabs: control tab visibility

[DmitryEfimenko]

I know that you can use ng-show or ng-hide or ng-if to set tab's visibility, but that does not cut it because if first tab happens to be set invisible, user still sees contents for the first tab and second tab is not set active.
There should be a separate control similar to disabled. For example: visible

[pixelnix]

+1
It seems like a bug that setting a tab hidden with ng-hide doesn't remove the active property from that tab. The active property should pass to the next tab in the tabset.

[wesleycho]

Closing in favor of #4836 - keep an eye out for that issue.