Summary:
We are seeing perf issues with hidden/obsolete handling.
`hg bookmark` is a frequently used command and by making it use the unfiltered
repo, it could be 200ms-300ms faster.
Test Plan: Added a new test
Reviewers: #mercurial, mitrandir, ikostia, ttung
Reviewed By: mitrandir, ikostia
Subscribers: mitrandir, rmcelroy, akushner, mjpieters
Differential Revision: https://phabricator.intern.facebook.com/D3692968
Signature: t1:3692968:1470777864:72ad5d0ffb52ecfcaaa607082693b88319d778fd
