user_mailman_register 5.x-1.5

#370262: No mail and Digest options not reflected in mailman: Added a mailman version option in the list configuration page. It's needed to correctly set it or digest and nomail subscriptions could not work
Set mailman user language according to the drupal user preferred language
#358532: Problems when users change their subscription with mailman manager: Set password empty for new subscriptions
#352615: Table too wide and rows too high by anoopjohn: Shortened admin list table
Minor bugs