Request: Filter the tests by focus (fdescribe)

[LegitTrevorTiernan]

Hi, First of all thank you for creating this excellent extension! I would like to request a (small?) feature. We've got a lot of tests in our project. When there's an fdescribe I'd like for the UI to filter out all the tests which do not have an fdescribe that way only relevant tests are listed. This could be expanded to also exclude xdescribe as well.