ui: change the hidden revision error message
It now display the same details than the warning
when the working directory parent become obsolete
like:
$ hg update 0
abort: hidden revision '0' (successor: f301a99bd857)!
$ hg up 1
abort: hidden revision '1' (pruned)!
$ hg update 0
abort: hidden revision '0' (successors: 91311af6da10, 70653776ec4c)!