Dropdown items in nav tabs can get stuck in .active mode

Created by: rebot

bug bootstrap alpha v4 - http://v4-alpha.getbootstrap.com/components/navs/#javascript-behavior When you press a button/tab in the dropdown, try another tab and go back, you will see that the button/tab under the dropdown hasn't been deactivated. I was implementing this in a project and came across this bug.

EDIT: It's worse.. You can't even 'reactivate' the tab. So it's stuck on 'active' mode and won't change your content in the tab view