feat(toolbox): add ability to run a handler after click to AbstractButton

react/features/base/toolbox/components/AbstractButton.js

 
 export type Props = {
 
+    /**
+     * Function to be called after the click handler has been processed.
+     */
+    afterClick: ?Function,
+
     /**
      * Whether to show the label or not.
      */
  */
 export default class AbstractButton<P: Props, S: *> extends Component<P, S> {
     static defaultProps = {
+        afterClick: undefined,
         showLabel: false,
         styles: undefined,
         toggledStyles: undefined,
      * @returns {void}
      */
     _onClick() {
+        const { afterClick } = this.props;
+
         this._handleClick();
+        afterClick && afterClick();
     }
 
     /**