add HTMLDocument live preview unit tests
fix jshint error
Spanish strings and sample translations for Sprint 31
code review comments
Merge pull request #5211 from adobe/jasonsanjose/sync-error-tests

Add live preview HTMLDocument and STATUS_SYNC_ERROR integration tests
Changes after Review
Missed some review comments
Merge pull request #5221 from TomMalbran/tom/spanish-sprint-31

Spanish strings and sample translations for Sprint 31