clfilter: do not use tags cache if there are filtered changesets
If there are filtered changesets the cache is not valid. We'll have to cache
tags for filtered state too, but for now recomputing the tags is enough.
clfilter: do not use branchmap cache if there are filtered changesets
If there are filtered changesets the cache is not valid. We'll have to cache
branchmap for filtered state too, but for now recomputing the branchmap is
enough.