Fix typo breaking XF1 => XF2 upgrade process
Improve upgrading from old XF1 (v1.3.x) versions of threadmarks
Fix "Cannot call method getRedirectLinkForThreadmark on a non-object (NULL)" on viewing a threadmark with hard deleted content.
Prevent recent threadmark list from being unexpectedly hidden
Prevent error when the recent threadmark dropdown contains links to deleted posts
Prevent mixing protected/public when extending entities
Remove padding for around threadmark quick-reply fields to reduce wasted whitespace
Reduce SQL queries added during search indexing threads
Fix post quick-reply being unexpectedly disabled
Attempt to reduce/prevent template errors during installing on very active forums
Fix error merging threads without threadmarks
Confirm compatibility with XF2.1
Add recent threadmarks to bottom of the thread
Convert enable/disable global option for threadmark icons into style properties
Allow linking to an existing threadmark index (via URL) along side prompting for a threadmark index on thread creation
Collapsible "linked content section"
Improve Collaborative Thread handling of threadmark indexes.
Fix compatibility issue with Thread Reply Banner
Allow viewing 'soft-deleted' threadmark index still linked to a thread
Relax rule preventing merging multiple threads with a threadmark index
If XF caching is setup, cache threadmark categories instead of querying for the list of threadmark categories