* Initial implementation to retrieve files from S3 bucket
* Addressed type warnings
* Implemented folder creation and deletion
* Add save UI for S3 bucket storage
* Implemented multipart upload to S3
* Implemented recursive deletion of objects when deleting folders from S3 storage
* Third party storage services can now be initialized from the save window
* Limit max keys for folder request
* Updated docs and integration
* Prevent auto open of file browser when connecting to 3rd party service in save modal
* Use alternate client registration for non-AWS based S3 endpoints
* Addressed issues with local MinIO based storage providers
* Added lazy thumbnail generation to S3 type storage
* Bugfixing
* Uniform click handler
* TDD approach then
* Fixed issue with thumbnail path resolving
* Add retry handler to overcome RequestTimeTooSkewed
* Renamed Selection data structure. Multiple select begins to work
* Saving and loading of multiple selection shapes implemented
* Renamed Document selection properties to avoid confusion
* Renamed and distributed functions between selection and shape utilities
* Fixes to selection toolbox
* Fixed issue with copying across multiple selections
* Final cleanups
* Selection outline is now rendered by interaction pane, not individual layer sprites
* Updated to zCanvas 4.3.1 to fix issue with bounding box detection on rotated content
* Refactored rectangles to always use left and top
* Layer scaling, rotating and mirroring is now a fast, synchronous operation
* Snapshots are now always of rendered layer content
