Complete Tabs

[jarydkrish]

Right now tabs don't really do anything.

We should probably change that. One of the examples we could take inspiration from is the concept of TabContent and TabPane from the reactstrap project.

It works by using context, which allows us to add a visible or active css class based on the state of the parent.

All tab content should be rendered on the page, even if the tab isn't visible. No rendering null.

[humphreyja]

closing in favor for tab switcher components. Not quite as much magic but gets the job done.