v9.1

• added: hook to change object subtypes for stale group check
• changed: consolidated admin pages in the same section
• changed: moved auto join group management to admin section
• changed: rewritten the auto join logic, now profiles can be created
• fixed: grouppicker styling issues
• fixed: stale group notification also includes empty groups in period
• fixed: use time_updated in cron, same as on group profile page