* Update grid blocks preview to match width of products on the front end
* Remove max-width from CSS, set it on the preview itself so we can use the dynamic theme width
* Override block thumbnail width for multiple column layouts
Previously larger thumbnails would cause multiple column layouts to break and wrap early. This enforces the column width for those cases
* Add the thumbnail size to images, to prevent larger images in multiple col layouts
* Update snapshot to new preview markup
* Add placeholder image for product preview
This adds the designated placeholder image url from settings into the
wcSettings global for the blocks to use. Then uses the placeholder url
when a product doesn't have any images.
* Updated based on review notes
Using `$block_settings` instead of `$settings`
Using '' alt tag
Updated snapshot
* Add the placeholder global to test that it passes through to the preview