5389: add hide on mobile to buttons

Author: Sine Jespersen

src/stories/Library/list-buttons/list-buttons.scss

@@ -30,5 +30,11 @@
         margin-right: 0;
       }
     }
+    &--hide-on-mobile {
+      display: none;
+      @include breakpoint-s {
+        display: flex;
+      }
+    }
   }
 }