WooCommerce Advanced Product Labels 1.3.0

* [Add] - Allow custom labels - Upload your custom images to use as product labels!
* [Add] - 'Custom' alignment - drag&drop the labels at any position!
* [Add] - Actual product image preview - select which product you want to preview the label on.
* [Add] - Check to see if labels are missing. Will show notice in admin if detected that labels are missing.
* [Tested] - Up to WooCommerce version 6.1

* [Update] - Add z-index: 99; for labels
* [Update] - Add additional checks for WC Active / Composite compatibility
* [Tested] - Up to WooCommerce version 5.1

* [Improvement] - Ensure styles are loaded on non-WooCommerce pages when labels are displayed