message: microsite: shrink banner and provide padding for close button
diff: @@ -1073,11 +1073,13 @@ code {
  .Banner {
  position: relative;
  padding: 14px;
  + padding-right: 50px; /* space for the dismiss button */
  margin: 14px 20px;
  border-radius: 4px;
  background-color: $primaryColor;
  font-family: Helvetica Neue, sans-serif;
  color: #000;
  + display: inline-block;
  }
  .Banner--hidden {
  