feature request: link the settings between sections

[Hi-there-how-are-u]

Hi! Would it be possible to have a tick box for linked settings or something. So if I set a certain drop-shadow opacity all drop shadows gets the same opacity? Same with the colour for drop-shadows, if I change the colour for one drop-shadow all would be changed. I was creating some themes and noticed it was pretty hard to get exactly same settings for blur-radius and other drop-shadow settings.