fix: event is undefined in $onBlur of QUISelect

I created a fix which may have appeared in the QUI Framework.

QUIQQER-UI is a modular user interface component framework written in JavaScript

Bug Fixes

• What was the issue(s)?

Issue: https://github.com/QUIQQER/qui/issues/1

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.

original issue: https://dev.quiqqer.com/quiqqer/qui/issues/36
original finder: @peat85

• What was the solution?

You can see this in the following pull requests:

https://github.com/QUIQQER/qui/commit/1d515a602f214db6f9122fccb17b216db2b62fad