message: Composer reply previews have group layout
diff: @@ -370,7 +370,7 @@ export default class MessageComposer extends React.Component {
  }
  return (
  - <div className="mx_MessageComposer">
  + <div className="mx_MessageComposer mx_GroupLayout">
  <div className="mx_MessageComposer_wrapper">
  <div className="mx_MessageComposer_row">
  { controls }
  