This feature involved a lot of refactoring in order to get working
correctly. I wanted to continue using the timeline view for chats thus I
used alternative styling & structure for DM event kinds. This worked
create since the elements map does not care.
There is some queing that has to be done to decrypt message content thus
I allow viewing messages even if they haven't been decrypted yet. I
think this is good for transparency since you understand what is and is
not decrypted. I do think that the UX could improve, because even tho it
is fast, it's flashes on new messages.
I did not implement saving of latest messages. I will do this later, but
this feature is big enough to merge as is: an alpha state that works.
I further abstracted profile & name updating to work in a more global
manner. Additionally I rewrote code that had attribute scripts to use
addEventListener instead. This is needed to happen anyways for security
and made the codebase easier to manage.