mw.ViewPageTarget: Swap captcha and badtoken logic in onSaveError

This way if both are the case, the user (or VE, if possible)
will deal with badtoken first instead of potentially having to
solve the captcha twice (as each handling of the error does - and
should - end with an early return).

Change-Id: I9e4264a7001ffa9654bfab02cc955aa36ff5b6aa
mw.ViewPageTarget: Add support for spam blacklist

Bug: 50826
Change-Id: Icdc2730e5fc644c9030a6648702e071934f5ad62
Merge changes Icdc2730e,I9e4264a7

* changes:
  mw.ViewPageTarget: Add support for spam blacklist
  mw.ViewPageTarget: Swap captcha and badtoken logic in onSaveError