fixing mention composition (#1752)
fixing mention composition (#1752)

* fixing mention composition

* useLayoutEffect -> useIsomorphicLayoutEffect
nikgraf/draft-js-plugin-editor,nikgraf/draft-js-plugin-editor,draft-js-plugins/draft-js-plugins,nikgraf/draft-js-plugin-editor,draft-js-plugins/draft-js-plugins,draft-js-plugins/draft-js-plugins,draft-js-plugins/draft-js-plugins