This commit uses maybe-overrided hero names for unnamed rooms in the places where the room name / hero names / room id will be displayed.

Type: add

CCBUG: https://iron.lily-is.land/T77

• Verify unit tests pass.
• Give some user an overrided name.
• Open an unnamed direct message room with that user.
• Check that the user's overrided name is displayed in the following:
  • In the room list
  • On the title of the room page
  • On the title of the room settings page
  • On the title of the room members page
  • On the title of the room invite page
  • On the prompt text of kick/ban popup