IE 11: Field propertis side panel not fully visible

Description of problem:
The header of field properties side panel is not fully visible in internet explorer 11. It is shifted to the top, so that the title / close button is barely visible. See screnshot

Version-Release number of selected component (if applicable):
BPMS 6.0.0 CR2

How reproducible:
Always

Steps to Reproduce:
1.Create a form modeler form
2. Add some field
3. Open that field's properties panel (mouse over the field and click the pencil icon).

Actual results:
The properties panel is shifted and its title not readable.

Expected results:
That panel should be displayed fully.