MST-970. If name affirmation is enabled, a user should only be allowed to make limited edits to their profile name before they are required to go through IDV. Right now, the allowable edits are limited to:
* add/delete/replace one character (including one space on either side)
Edits that are not allowed, and therefore require IDV include:
* changing 2 or more characters
* changing their name 3 or more times
This behavior will not be enabled until name affirmation is fully rolled out, so there should be no noticeable difference in account settings behavior at the time this is merged.
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