message: Don't reload the page when user hits enter when entering ban reason
diff: @@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
  limitations under the License.
  */
  -import React, { ChangeEvent, ReactNode } from 'react';
  +import React, { ChangeEvent, FormEvent, ReactNode } from 'react';
  import { MatrixClient } from 'matrix-js-sdk/src/client';
  import { RoomMember } from "matrix-js-sdk/src/models/room-member";
  import classNames from "classnames";
  @@ -76,7 +76,8 @@ export default class ConfirmUserActionDialog extends React.Component<IProps, ISt
  };
  }
  - private onOk = (): void => {
  + private onOk = (ev: FormEvent): void => {
  + ev.preventDefault();
  this.props.onFinished(true, this.state.reason);
  };
  @@ -144,7 +145,8 @@ export default class ConfirmUserActionDialog extends React.Component<IProps, ISt
  { reasonBox }
  { this.props.children }
  </div>
  - <DialogButtons primaryButton={this.props.action}
  + <DialogButtons
  + primaryButton={this.props.action}
  onPrimaryButtonClick={this.onOk}
  primaryButtonClass={confirmButtonClass}
  focus={!this.props.askReason}
  