Gracefully restart after user interaction

In the first attempt to deploy to office wiki something went wrong and
we manually reverted the moves to seven pages. On restarting the converter
it saw the first move and assumed everything was complete, when it
needed to perform the page move again.

This patch adjusts to only look at the most recent move, rather than any
move by the specified user.

Change-Id: If4287e128448bf9d3a0aa40d18815964371cacd8
Hygiene: Reach through MWTimestamp for the DateTime object

Rather than newing up an appropriate DateTime object, reach through
the MWTimestamp for its DateTime which keeps timezone handling
centralized.

Change-Id: I33643b1f29756e920a36e6b60c527ace6f817387
Merge "Gracefully restart after user interaction"
Merge "Hygiene: Reach through MWTimestamp for the DateTime object"