* Catch state error in homepage widget
* Add flutter_overlay_loader lib
- Displays an overlay screen to indicate blocking operation
* Wrap blocking widget transitions in a loading overlay
- Prevents user from doing other things while loading
- Shows the user that something is happening
* Linting fixes
* Show overlay when uploading attachment file
* Show overlay when downloading file also
* Show overlay when loading or submitting API forms
- Major improvements to usability "feel"
* UI improvements for stock item test results widget
* Fix API_FORM bug
- onSuccess function was not being called
