Leave FsprgEmbeddedStoreStyle unzipped

This allows changes to the contents to be tracked, version-controlled, and merged via github much more easily.

For example, I made .store-action-command and .store-product-detail-offer-title un-selectable and un-draggable. (I intended to put that as a separate pull request but github combined them so oh well.) This couldn't be so easily tracked and approved if not for the un-zipping of the style file.