* initial add of toolbar to v2 editor WIP
* fix Form test knocked out by rebase
* basic image upload functionality added to toolbar
* add cypress tests for toolbar
* move image tests to previous cypress spec
* test markdown insertion from buttons in jest
* small tidy up
* remove right padding in scrollable layout, hide scrollbar
* update tests following new line changes
* add more doc comments
* tweak padding css
* create constant for image placeholder
* add image uploader change missed in staging after merge conflict resolution
* Refactored drag n drop functionality to a hook and component.
* Add the snackbar to the article editor.
* Now you can drag and drop images in the post body content.
* Cleaning up a few things.
* Now post cover images can be dragged and dropped.
* Removed unused empty function.
* Added @testing-library/preact-hooks so that we can test hooks.
* Some renaming, small refactor.
* Added tests
* Added more tests.
* Added more tests.
* Added message about dropping only one image in post body.
* Added message about dropping only one image for cover image.
* put onDrop into it's own meethod.
* More tests.
* Added some API documentation.
* Updated editor help with drag and drop image help.
* Changed wording.
* Now the alt text for markdown removes the file extension.
* Updated help wording. Thanks @rhymes
* Now the image markdown adds a new line at the end as we currently do not support inline images.