Description of problem:

It is not possible to input other than AlphaNumerical characters in the Task Group ID.

This is a bug because of :

— you can't input multiple groups using comma separated list (g1,g2)
--> you can't enter the comma
— you can't implement dynamic group resolution with using an expression
--> you can't enter #

How reproducible:
always

Steps to Reproduce:
1. Create BPMN process in JBDS
2. Drag Human Task on the canvas
3. open properties and try to input some special character into the groupid property.

Actual results:
Special character can't be inputted into GroupID property in Human Task

Expected results:
Special character can be inputted into GroupID property in Human Task

Additional info: