Count more reactions when considering the highest rated comment #2190

Because of #2108 we can see the most helpful comment (thanks @lubien!). At the moment that only counts 👍 as a positive and 👎 as a negative. But there are more reactions that can be used to indicate a post is helpful or not. How about we also count those?

I've left the ambiguous 👀 and (the slightly less ambiguous) 🚀 out.