Discussion editor not responsive in mobile view

Hello. When I reply discussion in mobile portrait view, editor’s popup with uploading pictures is not responsive (more at the screenshot).

1. Is it possible to make it responsive? Or it’s third party editor and can’t be customized?

2. Can I replace this editor by another one? Seems I saw option in backend.

3. Can I disable editor for reply and use standard EasySocial comment form with ability attach picture, use emoji and tag friend?

Thanks.