Navtabs active index wrong

[mbeckenbach]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

Correct active highlighting

What is the current behavior?

When removing or adding a tab via ngIf the active tab highlight from routerLinkActive is not beeing updated.

An example:

Tab 1 | Tab 2 | Tab 3 (Active) | Tab 4

When you remove Tab 2 from the DOM, the active highlight will move from Tab 3 to Tab 4 as it seams to be bound to the index and not to the router link.

What are the steps to reproduce?

Not sure how to create a plunkr with routing sorry

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

ng 4.1.x, md2 beta 5

Is there anything else we should know?

[angular-automatic-lock-bot]

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