Remove deleted repos from my "recently viewed" list (BB-6923)

Hi,

Two things, one arguably a bug but a minor one, and one probably a feature request:

1. I deleted some repos, but they continue to clutter up my "recently viewed" list. Since deleting a repo is not a reversible operation, they should be removed from the recently viewed list automatically.
2. Even without deleting repos, I should be able to remove them from my "recently viewed" list (or at least clear the list).

Thanks,

– T.J.