* [ACS-4364] Add tree component and categories service
* [ACS-4364] Add tree component to public api
* [ACS-4364] Refine tree unit tests
* [ACS-4364] Intergrate adding and deleting category
* [ACS-4364] Restyle load more button in tree component
* [ACS-4364] Missing semicolon
* [ACS-4364] Fix code styling
* [ACS-4364] Add docs for tree component and category service
* [ACS-4364] CR fixes
* [ACS-4364] Hide header row when displayName is not provided
* [ACS-4364] Docs fixes
* [ACS-4364] Add helper methods, code cleanup, unit tests for new methods
* [ACS-4364] Add missing semicolon
