Uh, ok, now I notice my phone needs resizing before I may be able to resize the window. ;-)
Concerning the email chat something I did not realize at the beginning is how one starts using the interface alone, just because it is so easy to use on mobiles for sending emails to people (no matter were/if they have other messengers), even if the others have never used an email chat app before and just answer as always in the beginning. It's an individual decision for casual communication. If the fully fledged email app can also support email chat (and be THE one for ubports) that would be just perfect. The deltachat-core takes care of sorting out chat versus email, and all the protocol and sync stuff needed by the frontend. For the users it would allow to move messages seemlessly between quick chat send/respond and fully fledged email conversation.
Sent with my Delta Chat mobile E-Mail Messenger. Please excuse my brevity.