* Fix-Show barcode as image in emails and on frontend pages.
* Tweak-Remove email link for viewing barcode in browser.

* Tweak-Set Vendor Email field to required and add validation.
* Tweak-Improve clarity of Vendor Email input field description.

* Fix: Move environment testing to before including any other files. Fixes fatal error when WooCommerce is not active.

* Tweak-Added responsive styles. 380px form-width breakpoint is editable using the ‘woocommerce_bundle_front_end_params’ filter.
* Tweak-Made various small styling tweaks in Product Bundle pages.
* Tweak-Added styles for basic improved compatibility with the Astra and Flatsome themes.
* Tweak-Backfill current bundled item data in bundle configurations extracted from orders.