First issue:
 - The "document is totally signed" was based on the last signature of
   the last page (that had signatures) that is not correct and needs to
   be based in the last signature by date

 - The "Rev #" number was based on the signature on the page, so if we
   had two pages with one signature each the model showed "Rev 1" for
   both

It adds new API which is not awesome in a stable branch, but the first
issue is important enough that warrants this to go to the stable branch