I found a temporary work around friends! I think it's probably a glitch but in short:
- Temporarily make the category selector filter from features instead of grouped values.
- In actions, add the zoom action like Derek showed in the picture in reply to OP.
- Exit the tool, use the selector really quick to filter to a single point.
- Reconfigure the category selector, except now change the "Categories from" to "Grouped values"
- Look at the action menu again, you will see the zoom action was left in after switching (please see attached pictures to this post) .
From the little testing I have done, it seems to work exactly how we would like it to. If it does not work for people here, I can make the dashboard I'm using public, but give this a shot first.