Issue #407: Registering an application fails

I am not able to register/create an application within the Application Management. Each time I try I get the message "Not a valid URL format" for the callback URL. I tried several different URLs like:

http://xxx.xxx.xxx.xxx:8080/pathToTheApplication
xxx.xxx.xxx.xxx:8080/pathToTheApplication
http://www.google.de
http://www.SomeDomain.de

Even leaving the callback URL blank (as it is indicated in the help text) does not work. Therefore I am unable to register an application.