v7.3

• added: group mail members allowed for group members
• added: new groups require admin approval (plugin setting)
• added: option to disable friends invite tab
• added: plugin/group setting to require motivation on group join
• added: plugin setting to disable matching email addresses to users
• changed: group invites also sent to site notifications
• fixed: contain status string withing image block body
• fixed: double encoding in grouppicker
• fixed: group mail only to verified group members
• fixed: membership requests don't get removed from the list on decline
• fixed: my status sidebar has incorrect group join link/text
• fixed: prevent ENTER in autocomplete from submitting the form