Allow ResizeHandle to work with Grid System

[CalebGriffin]

Description

Hi,

I'm using this amazing library to create a flowchart and I make use of the Grid System (which I understand is a relatively new feature). I am also trying to use the Resize Handles and have found that they don't work with the Grid System.

If there is a workaround please let me know!

Additional Context

No response

[siarheihuzarevich]

Hi. Created a task. I'll do it