Replace react-bootstrap modal with ant-design

replace react-bootstrap modals with ant.design modals in frontend:
https://ant.design/components/modal/

Editor RejectTranslationModal *
Editor SuggestionDetailModal
Editor GlossaryTermModal
Frontend NewLanguageModal *
Frontend User Profile RecentContributions Modal
Frontend TMXExportModal
Frontend Glossary NewEntry Modal *
Frontend Glossary Import Modal *
Frontend Glossary Export Modal *

* Also converted all contained react-bootstrap components to ant.design