The feature toggle will determine which bulk products screen shows. An additional products_old path is also temporarily added for easy reference.
Later, when the old screen is full removed, we'll probably rename the _v3 classes to tidy up.
Perhaps this should be tested in the system spec too ("I can rename a product and still see it after saving"). But I'd like to find the compromise to avoid bulking up system specs too much. I think it's covered well enough by the reflex spec?
(For now at least,) we use one big standard Rails form, and ModelSet to update each record.
Submitting with Reflex allows us to manage the loading state along with the rest of the page (although I would rather use the built in HTTP POST standard).
Aria-label makes it a bit easier for testing (and accessibility software of course!). Technically it should have been aria-labelledby="id_of_column_header" but that would have resulted in more HTML and processing, which seemed silly.
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