* Fix error not being displayed when adding an account alias, add error for self-references

Co-Authored-By: Mélanie Chauvel (ariasuni) <perso@hack-libre.org>

* Add “You have no aliases.” note in confusing empty aliases table

Co-Authored-By: Mélanie Chauvel (ariasuni) <perso@hack-libre.org>

Co-authored-by: Mélanie Chauvel (ariasuni) <perso@hack-libre.org>

Fix #10736

- Change data export to be available for non-functional accounts
- Change non-functional accounts to include redirecting accounts