cubicweb-vcreview #4897300 detect changes between revisions of a patch even when going through the "outdated" state [validation pending]

We should not reset patch's state to "pending-review" when its revisions set has gone through an outdated state. The current code does not handle this case, which occurs quite often in practice.

priorityimportant
typebug
done in2.1.2
load1.000
load left0.000
closed by#8f0a5a31d7b7 [hooks] Restore an "outdated" patch to the state it was previously upon new revision arrival
patch[hooks] Restore an "outdated" patch to the state it was previously upon new revision arrival [applied]