Context Navigation

Changes between Initial Version and Version 1 of Ticket #6148, comment 16

initial	v1
9	9	- Non UI codes with assumptions that users must have first_name and last_name(e.g. REST API)
10	10	- The priority of names. At least, users have `nickname` and `display_name`.
11		- How to handle backward compatibility. We can update user_meat on upgrading process, but it can be brutal to generate user's full_name with first_name and last_name. Some WordPress sites have worked well with names with 2 parts.
	11	- How to handle backward compatibility. We can update user_meta on upgrading process, but it can be brutal to generate user's full_name with first_name and last_name. Some WordPress sites have worked well with names with 2 parts.