Set line-height on .data-set class (#31659)

frontend/components/DataSet/_styles.scss

@@ -1,29 +1,21 @@
 .data-set {
+  display: flex;
+  flex-direction: column;
   font-size: $x-small;
+  gap: $pad-xsmall;
 
   &__horizontal {
     display: flex;
     gap: $pad-small;
   }
 
-  // ff only
-  @-moz-document url-prefix() {
-    display: flex;
-    flex-direction: column;
-    gap: 6px;
-  }
-
   dt {
     font-weight: $bold;
     display: flex;
-    gap: $pad-xsmall; // For deprecated sandbox icons
-    // white-space: nowrap; // Future-proofing: Prevents unexpected wrapping,
-    // consider uncommenting and testing if layout issues resurface.
   }
 
   dd {
     display: flex;
-    gap: $pad-small;
     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;