message: set aria label on main composer too
diff: @@ -24,6 +24,7 @@ import {PartCreator} from '../../../editor/parts';
  import EditorStateTransfer from '../../../utils/EditorStateTransfer';
  import {MatrixClient} from 'matrix-js-sdk';
  import BasicMessageComposer from "./BasicMessageComposer";
  +import { _t } from '../../../languageHandler';
  function createMessageContent(model, editedEvent) {
  const body = textSerialize(model);
  @@ -69,7 +70,7 @@ export default class SendMessageComposer extends React.Component {
  }
  }
  - _sendMessage = () => {
  + _sendMessage() {
  const {roomId} = this.props.room;
  this.context.matrixClient.sendMessage(roomId, createMessageContent(this.model));
  this.model.reset([]);
  @@ -98,6 +99,7 @@ export default class SendMessageComposer extends React.Component {
  ref={this._setEditorRef}
  model={this.model}
  room={this.props.room}
  + label={_t("Send message")}
  />
  </div>
  );
  