Anti-favorite (Ignore)

**Is your feature request related to a problem? Please describe.**
I periodically go through and test a bunch of apps of a certain type, then a while later I like to revisit things and look for new apps of that type, but it can often be difficult to filter out new ones from ones I've previously tried and didn't like.

**Describe the solution you'd like**
Just like apps can be favorited, having the ability to mark an app as an anti-favorite, i.e. as one that was disliked, would make it easy to ignore them later to avoid wasting more time on them.

**Describe alternatives you've considered**
A personal rating system, which would be even better and should be easier to implement than a public one.