## Description
Replace the PDF renderer with an custom image renderer.
This allows us to remove the "react-pdf" dependency and allows us to use
a virtual list to improve performance.
- Fixed z-index when dragging pre-existing fields
- Refactored document flow
- Added button spinner
- Added animation for document flow slider
- Updated drag and drop fields
- Updated document flow so it adjusts to the height of the PDF
- Updated claim plan dialog
David Nguyen