Spacing fixes in forms

form - helps with capturing the submit top level. no styling
fieldset - helps with disabling elements in single place. no styling.
   in html, this does have a default border which we remove in style.css.

FormGroup - pankow element. This defines the spacing between adjacent
   FormGroups as 6px.

dashboard/src/style.css

@@ -250,10 +250,6 @@ a.pankow-breadcrumb-item {
   transform: rotate(90deg);
 }
 
-fieldset > * {
-  margin: 6px 0;
-}
-
 /* Animations */
 .slide-fade-enter-active {
   transition: all 0.2s ease-out;