Collaborative Threads 2.12.0

• Fix possible "[E_NOTICE] Undefined index: "

• Allow the thread starter in a collaborative thread to participate in collaborative post editing that other collaborators have started

• Fix removing a collaborative group with user in it throws exception
• Reduce SQL queries added during search indexing
• Send alerts when a user is added as a collaborator to a thread
• Send alerts when a user changes ad-hoc groups in a thread (ie del+add op)

• Fix XF2.1 support

• XF2.1 support
• Allow collaborators of the 'first thread' to edit an attached threadmark index
• Minor code cleanup

• Fix issue where error message is suppressed when using collaborative threads
• Ensure when edit history is disabled it stays disabled with the svCollaborativeHistory option set

• Fix "Call to a member function isCollaborator() on integer" when deleting a forum

• Fix inconsistent permission evaluation due to unexpected cache clearing (resulting in a viewer not being considered a collaborator in some contexts).

Bugfix update

• Fix for "in_array() expects parameter 2 to be array, null given"
• Remove usage deprecated array_column wrapper function

• Split collaborative threads moderator permissions into separate interface group
• New option; 'Special "All" group shares the implicit "Manage Collaborative Threads" permission for a collaborative thread' (enabled by default)