message: Cleanup tooltip classnames
diff: @@ -244,9 +244,8 @@ export default class Field extends React.PureComponent<PropShapes, IState> {
  const Tooltip = sdk.getComponent("elements.Tooltip");
  let fieldTooltip;
  if (tooltipContent || this.state.feedback) {
  - const addClassName = tooltipClassName ? tooltipClassName : '';
  fieldTooltip = <Tooltip
  - tooltipClassName={`mx_Field_tooltip ${addClassName}`}
  + tooltipClassName={classNames("mx_Field_tooltip", tooltipClassName)}
  visible={(this.state.focused && this.props.forceTooltipVisible) || this.state.feedbackVisible}
  label={tooltipContent || this.state.feedback}
  />;
  