(BUG) Diff links wrong after editing

[Michael Allan]

This is now fixed.

> After editing a draft, diff-bridge links still point to the old diff.
> This affects the left link in the link track, and the top link in the
> draft.  A probable workaround (untested) is to clear persisted state:
> http://zelea.com/project/votorola/_/javadoc/votorola/s/gwt/stage/Stage.html
> 
> The fix is delayed while I code stage 2 rollout support, which Conseo
> needs for his work.  http://zelea.com/project/outcast/dep.xht#mul
> 
> Est. fix by 27th.