composer-default doesn't handle complicated usernames

[BrotherGlaucon]

I ran across an obscure bug. I am sure it is low priority but I figured I would log it for future reference...

nodebb-plugin-composer-default fails to correctly display complex usernames when 'mentioning' the user. Specifically, any username characters that require escaping are replaced with '-'. The three guilty characters that I discovered are '*', '.', and '+' . There may be others.

For example, a user named John.Doe would be mentioned as @John-Doe.

This does not affect 'mention' functionality, as the links and notifications remain intact. It would however affect things like text-based searches for usernames. ...A complex username also apparently breaks nodebb-plugin-dbsearch, for it cannot find any posts from my strangely-named user.

[BrotherGlaucon]

...Oh, I get it now. Usernames are slugified on purpose.

Regarding the search error, it happens specifically on my user named "Complex-x*x+x.x". Search cannot find this user's posts. When I re-open the Posted by input in `nodebb-plugin-dbsearch' that user gets replaced by "Guest".

(v3.1.6)