Hide current active tab in container

[groovecoder]

Need Tanvi and/or @johngruen to decide if this is the desired behavior:

When a user hides a container, be sure to hide the current active tab if it's in the container, so they fully and completely hide that container.

[groovecoder]

Removing the bug label, because the implementation in #27 does this.

@johngruen and/or @TanviHacks - if either of you decide we want to keep the current active tab open when the user closes its container, just file a new issue to that effect.

[TanviHacks]

I think we need to close the current active tab if it is the container type that the user chooses to Hide. So, if user is viewing a Personal tab, and clicks Hide on Personal, the current Personal tab that is in view should get hidden. We can ask John to confirm in tomorrows meeting.