CSS Border on Welcome Dialog

[MrsP-from-C]

In my GtkInspector this one works:

Code:

.gimp-welcome-dialog .vertical {background: transparent; border:1px solid yellow;}
.dialog-vbox .vertical  {background: transparent; border: none;} 

You'll need both definitions, because the first one grabs too much.
If gimp.css does not work, try to put it at  ... /themes/Default/common.css