event is undefined in $onBlur of QUISelect
File: https://juicer.namefruits.de/packages/bin/qui/qui/controls/buttons/Select.js?update=1518425466
Line Number: 902
Error: TypeError: event is undefined
Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:58.0) Gecko/20100101 Firefox/58.0
Seems to be happening on Firefox on Mac OS X.