Description of problem: Statistic on the document view in editor always show loading in the last page. Issue seems to happen on any project with more than 1000 documents.
Pull request: https://github.com/zanata/zanata-server/pull/824
Found out the issue can be reproduce when a version contains empty document.
VERIFIED with Zanata 3.6.3-SNAPSHOT (git-jenkins-zanata-server-github-pull-requests-3617)