Thank you, Shyam.
I updated the example to use percentages for width and height (see: http://jsplayground.syncfusion.com/uwtjfie1) however when you resize the panel you'll see that the symbol palette retains its width while the diagram adapts. That doesn't seem to be the behavior you are expecting with percentages, right?
Thank you for your patience, Shyam.
I apologize, I misunderstood your original explanation - the example helped with that.
I'll proceed with that recommendation in a custom binding extension for my KnockoutJS implementation.
Kind regards.
Robert