Feature Suggestion: Local User Aliases (Real Names)

With the growing number of users, it's getting difficult at times to tell who's behind a display name.

How about adding the ability to add a local user alias (e.g. on the user profile sidebar) and if set, use that alias to identify the user in the chat window etc.

For example: Instead of having "ufired" (full: ufired:matrix.org) displayed, you could locally use the display alias "Donald". 