message: Use DialogButtons in SessionRestoreErrorDialog
  Use DialogButtons to eliminate duplicate button code.
diff: @@ -40,6 +40,7 @@ export default React.createClass({
  render: function() {
  const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
  + const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
  let bugreport;
  if (SdkConfig.get().bug_report_endpoint_url) {
  @@ -68,11 +69,9 @@ export default React.createClass({
  { bugreport }
  </div>
  - <div className="mx_Dialog_buttons">
  - <button className="mx_Dialog_primary" onClick={this._continueClicked}>
  - { _t("Continue anyway") }
  - </button>
  - </div>
  + <DialogButtons primaryButton={_t("Continue anyway")}
  + onPrimaryButtonClick={this._continueClicked}
  + onCancel={this.props.onFinished} />
  </BaseDialog>
  );
  },
  