Password reset date on export

There is now an additional column on the Users export which has the date and time each user's password was last reset. This allows site administrators to have oversight on when passwords are being changed and how frequently. It allows greater control should you have a password rotation policy you wish to enforce.

If the field for password reset date is blank it means the user last reset it before June 2018, (when this new column first appeared on the 'Users' export), so dates will only be included in the field when users begin changing their passwords after that point.