* Initial reword of upload to MVVM.
* Update tests
* More incremental improvements
* Refactor tests to use helper method for composer uploads.
* Add drag and drop tests
* lint
* Add commentary
* fixup test
* More precise selector
* Retarget uploads
* lint
* fixup
* one more type
* update snap
* Fixup composerUploadFiles
* fix import
* lint
* Copy and paste fixes too
* Add tests for pasting
* Add tests for pasting files.
* Remove redundant fn
* rm comment
* tidy up
* Test cleanup
* More clean up
* another fix
* Use condensed version
* Cleanup tests
* more cleaning
* last bity
* s/throw Error/throw new Error/