This allows the firmwareFlashUsbDfu to take an arbitrary binary blob
instead of a Pybricks firmware.zip file. This will allow it to be used
to restore the official LEGO firmware as well.
This adds an optional key parameter to alertsShowAlert() to allow
overriding the key. This allows us to call flashProgress using that
action instead of having to use the toaster directly.
Instead of rendering the toaster separate from the main index, add it
there so we can inherit all of the context providers. This requires
passing the ref object instead of the toaster instance itself, so
sagas have to be updated.
David Lechner