Fixed issue #09127: Invalid quota broke quota view
Fixed issue : Miscalculation of completed quota for Multi Question type
Dev: see :http://bugs.limesurvey.org/view.php?id=9066#c30080 for miscalculation
Dev: Todo : use getQuotaCompletedCount in checkQuota function
Dev: Todo remove quota members when removing a sub question, but allways need a fix for old survey