Fixed ie9-11 remove issue
Fixed ie9-11 remove issue

Kindling/react-tinymce-mentions,Kindling/react-tinymce-mention,Kindling/react-tinymce-mention,catalinmiron/react-tinymce-mention,Kindling/react-tinymce-mention,catalinmiron/react-tinymce-mention,catalinmiron/react-tinymce-mention,Kindling/react-tinymce-mentions,Kindling/react-tinymce-mentions