Add filter for branch name

[Wesztman]

Would be nice to be able to select certain branches (more than one) similar to the project setting :)

I want to have this on a big screen in our office, but I only want to show the status och "main" and "master" branches :) And while at it the same for repos would also be nice so that I can select a subset of repos which are interesting :)

I would love to contribute myself, but I'm not very good at typescript :(

Cheers Carl