Decision Service can not be larger than 500 (width) x 200 (height)

Currently the size widget in the "Properties Panel" is a slider that needs min and max values. We’d need to move to a simple (numeric) Text Box and remove the use of the slider.

Acceptance test

• No slider in properties panel for all nodes
• No Max for decision service node
• Min for Decision service node
• Max and Min for all nodes expect of Decision Service