[ON HOLD] hide tab when no results

[ChristopherChudzicki]

On hold pending decision whether we actually want to do this.

What are the relevant tickets?

• closes https://github.com/mitodl/hq/issues/4547

Description (What does it do?)

Hides search tabs when there are no results.

Screenshots (if appropriate):

Video:

tabs_video.mov

If tab has 0 results but is active, show it:

If tab has 0 results but is not active, hide it:

How can this be tested?

1. Check that tab is hidden if there are not results:
   • Search for something like "cats" that will have no programs. The "Programs" tab should disappear.
2. Check that if the tab is active AND there are no results, it is still visible.
   • clear your search
   • select the "Programs" tab
   • repeat your search for "cats" (or whatever) from (1).