v2.2

• Collection Tree now requires Omeka Classic 2.8 or newer
• Collection Tree no longer saves a separate copy of the collection titles and instead looks up the current titles when displaying the tree. This fixes issues that could occur if collections are created or modified while Collection Tree is disabled.
• Added in-request caching for collection children to improve rendering speed for large trees (contributed by @jajm)
• Fixed a PHP warning that could occur when a parent collection was missing or private
• Added a heading to the public collection tree page
• Added a class to more easily target the collection tree page for styling
• Updated code style

v2.1

• Display collection hierarchy when selecting collections (#17 @Daniel-KM)
• Add option to browse root-level collections only (#21 @Daniel-KM)
• (#22 @Daniel-KM)
  • Add option to merge items of child collections when browsing a parent collection
  • Add option to expand search to subcollection items by default