Use Unity's gradient field for UIBlock 2D radial gradients

[1auralynn]

I would like more control over the gradient in UIBlock 2D's gradient option, request adding support for Unity's gradient editor.

https://www.dropbox.com/s/1ji6jo86fhl6igf/Screenshot%202022-11-23%20140353.png?dl=0

For example, I'm creating a vignette for an image (from (0,0,0,0) to (1,1,1,1)) but have no control over the falloff so it's tough to achieve the look I want (a very gradual fade from the edges but full opacity in the center).