Social Groups (XenForo 2.x.x) 4.0.9

[Bugs]
* Fixed error while inviting other people
* Fixed error while reposition cover
* Fixed inline mod show up even visitor does not have permission to do.
* Fixed group filters does not work in some cases
* Fixed banned member still view group
* Fixed cannot change the member role description
* Fixed delete comment did not clean up related data
* Fixed delete event did not clean up related data
* Fixed non-member can view closed and secret group content
* Fixed delete user not clean up user data
* Fixed username changed not update to latest value.
* Fixed join link in group preview does not work.
* Fixed inline mod delete groups did not work in some cases

[New Features]
* Added group widgets
* Send alert to group members when new event published
* Send alert when new request to join the group. Only members who has member role `Approve members` can receive alerts.
* Add move groups to another category. Only users belong to user groups has `Move groups` can do it.
* Show random members on group preview
* Added badge `new` to group has new content which user did not see in the last visit group.
* Added global page show upcoming events of all groups.
* Added new user group permission `Add groups` to restrict users can create groups

Notable Changes:

• Fixed cannot creating group
• Fixed call to undefined method trigger error.

Notable Changes:

• Added importer to importing data from add-on [Nobita] Social Groups to this add-on.
• Added group custom fields
• Added more member roles
• Fixed cannot see closed groups for guest* Fixed cannot see secret groups for guest
• Fixed group counter not working
• Added more group rebuild cache
• Much more improvements.