Merge pull request #199 in ZP/z-push from bugfix/ZP-866-after-exporting-a-change-states-used to develop

* commit '7e9fba07':
  ZP-866 Remove debug.
  ZP-866 Save if a new state was being confirmed and should be used by empty sync requests. If the state is not confirmed (requested at least once by the mobile), the old state is used and the change is potentially being exported again.