Setting the email subject for new contacts

[Raiden]

Maybe this could also be a solution for setting a subject in 1:1 chats.
It would not require any UI changes.

Subject of emails

I have an idea how a subject could be implemented without having to change the UI. Essentially a subject is nothing more than a tag. DC-Desktop already supports hashtags. In my opinion, this is a very useful feature. The hashtag is underlined and clickable. After clicking on it, all messages in the chat containing this hashtag are displayed in the search window. To add a subject to an email to a non-DC contact, users could place a hashtag at the beginning of a message. Whenever DC detects such …