Hi, check my issue. I wrote my example, but there are actually limitation of dialog height. Styling modal with CSS for Forge Custom UI - #3 by MateuszKorczyski. If you have any question, I will try to help you 
Hi, check my issue. I wrote my example, but there are actually limitation of dialog height. Styling modal with CSS for Forge Custom UI - #3 by MateuszKorczyski. If you have any question, I will try to help you