allow user to add note/comment next to login/password values

Having a note or comment next to the login/password values can solve various problems:
1. Some users have multiple accounts on the same site, so a note may help distinguish which account is for which purpose. (family pictures vs work pictures, social calendar vs work scheduleg, personal bank account vs child's bank account, etc.)
2. Remembering a site's password requirements can making choosing a password easier/faster. (e.g. capital and lower case, repeating numbers, special characters, etc.)