Currently, when hovering over a username in the new issue view, a card pops up showing information for that user (e.g., their email address). It would be nice if a button was added to that pop-up/popup/card so that a user can click on it and it copies the email address of that user to the clipboard.

In the old issue view, it is at least possible to triple click on the email address and then copy it to the clipboard. This functionality or the aforementioned button is desired in the new issue view as well.