message: Remove unnecessary right margin in reply blockquote
diff: @@ -24,6 +24,7 @@ limitations under the License.
  blockquote.mx_ReplyThread {
  margin-left: 0;
  + margin-right: 0;
  margin-bottom: 8px;
  padding-left: 10px;
  border-left: 4px solid $button-bg-color;
  