1) Extend the CSS "Edit Box Properties" dialog so that it's possible to set the 2nd parameter block of "border-radius".
Currently it's only possible to set the first 4 values.
border-radius Formal syntax: [ <length> | <percentage> ]{1,4} [ / [ <length> | <percentage> ]{1,4} ]?
The syntax of the first radius allows one to four values:
border-radius: radius
border-radius: top-left-and-bottom-right top-right-and-bottom-left
border-radius: top-left top-right-and-bottom-left bottom-right
border-radius: top-left top-right bottom-right bottom-left
The syntax of the second radius also allows one to four values
border-radius: (first radius values) / radius
border-radius: (first radius values) / top-left-and-bottom-right top-right-and-bottom-left
border-radius: (first radius values) / top-left top-right-and-bottom-left bottom-right
border-radius: (first radius values) / top-left top-right bottom-right bottom-left
2) Extend the CSS "Edit Box Properties" dialog so that it's possible to set multiple "box-shadow" parameter blocks.
3) Extend the CSS "Edit Box Properties" dialog so that it's possible to create advanced color gradients with multiple color-stops and transparency.
Tested in WeBuilder 2015 v13.2.0.164