Fix: Ext JS Simlets and omitting the status code​

I recently stumbled upon a mean error that was hard to track down. Luckily, the issue was caused by a simple carelessness regarding fully configured response-objects of Simlets used in the dev-environment of the conjoon-project and did not require any large refactoring.

The original issue is tracked here: https://github.com/conjoon/extjs-app-webmail/issues/196