phases: only synchronize on common changeset when push fails If push failed we should not expect the pushed changeset to exist on remote. The common set before the push is used for phase related operation instead of common + missing. Note: * We still pull phase data even if push fails * We still try to push data even if push fails (same than bookmark)

discovery: diet discovery.prepush from non-discovery code The ``discovery.prepush`` function was doing multiple things not related to discovery. This changeset move some code into the ``localrepo.push`` method. The old ``discovery.prepush`` function jobs is now restricted to checking for multple head creation. It was then renamed ``discovery.checkheads``. This new ``discovery.checkheads`` function may receive several other changes in the future but we are a bit too much near the freeze for a wider refactoring.

qfinish: set all qfinished patch as draft, not only qbase Fix a silly bug.