message: [Minor] Fix warning about accessibility issue
  Warning: [react-bootstrap] Specifying only the `"hover"` trigger limits the visibility of the overlay to just mouse users. Consider also including the `"focus"` trigger so that touch and keyboard only users can see the overlay as well.
diff: @@ -60,7 +60,7 @@ export class ToolbarDropdown extends React.Component<ToolbarDropdownProps, Toolb
  <OverlayTrigger
  key={'ot-' + this.props.id}
  placement="top"
  - trigger="hover"
  + trigger={['hover', 'focus']}
  delayShow={1000}
  overlay={<Tooltip id={'tt-' + this.props.id}>{this.props.tooltip}</Tooltip>}
  >
  