Description of problem:
With Teiid Desitner, user can't set "System Table Access" for "VDB Data Role" with a small display
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Set display resolution as "1024×768"
2. Open VDB file
3. Click "add data role" button
User can't set a check box for "System Tables Access"
ModalPanel has a scroll window, so user can set it