This is a common feature in other chat applications (like Discord) as a
way to keep track of important information. While there isn't a standard
API for this, we can use account data to store notes.
This can happen if the user doesn't have an avatar set, as there's an
assert check inside of makeMediaUrl. We can avoid this by checking if
the string is empty before calling that.
Since Matrix allows users to have different profiles on a room and
"outside of room" level, it's nice to have the ability to switch between
them on-the-fly.
Our previous iteration is hitting some limitations as the power of
profiles on Matrix grows. For example, where do we put common rooms or
extra profile fields?
I re-arranged everything to group similar actions together - instead of
throwing it all into one big list. We basically trade vertical for
horizontal space, and gives us more headroom for extra fields when we
want to add more.
Unfortunately a pretty common spam/annoyance online is putting "spam"
via abusing Unicode symbols - which is used for multilingual support -
in display names. This typically results in an unreadable word jumble in
our UI, which looks bad.
So I decided to put a stop to that by clipping some labels that could be
used for this crap. I didn't cover *everything* yet, but this at least
prevents these idiots from showing up in the completion menu, the room
member list and as authors for messages.
In other messaging applications (e.g. Discord) this is possible through
text modifiers like "from:@user". We don't support that, and I'm not
super keen on implementing yet-another-parsing-thing, so an action in
the user detail dialog should work for now.
Very useful to sift through large rooms but when you only care about a
specific person's messages (maybe your own?)
