Description of problem:
When you edit properties of a form field, you might be unable to save the changes, because it's impossible to scroll all the way down to the save button of the field properties panel. Observe the problem in the video attached. I believe it might negative consequence of a fix to Bug 1066483. The problem is the same in firefox as well as in latest google chrome.

Version-Release number of selected component (if applicable):
BPMS 6.0.1 ER2

How reproducible:
Always. It might not be problem on screens with huge resolution, but on my screen, which has 1920 x 1080 it is a problem.

Steps to Reproduce:
1. Open some form, in section 'Add field by type' add for example field of type short text.
2. Mouse over the field and click pencil icon to edit field properties.

Actual results:
The form properties panel's save bottom, which should be visible in the bottom cannot be scrolled to -> unable to save.

Expected results:
Form canvas should automaticaly resize when the field properties panel is opened, so that user can scroll to save button.

Additional info: