Allow single-letter first and last names in user accounts
Currently, the first name and last name fields validation requires at least two letters, preventing users with a single-letter first or last name (e.g., "A") from creating an account. The regex that does the validation should be adjusted to accept single-letter names while still restricting unsupported characters.
This issue was originally raised on Slack by @mplagge, who was contacted by an Open VSX user unable to create an Eclipse account because one of their names contains only a single letter.
Edited by Eric Poirier