fix(ADA-98): Moderation - focus should return to plugin button (#827)

export focusElement function. part of - #71

solves ADA-98

src/utils/index.js

@@ -1,4 +1,5 @@
 export {bindActions} from './bind-actions';
+export {focusElement} from './focus-element';
 export {KeyMap} from './key-map';
 export {default as getLogger} from './logger';
 export {withKeyboardA11y} from './popup-keyboard-accessibility';