AliExpress Dropshipping Business plugin for WooCommerce 3.5.1

- Improved: shipping popup styles in frontend
- Added: shipping info refresh on product quantity change
- Fixed: shipping info data for the UK
- Fixed: shipping module minor bugs

*Enhanced shipping module
- show shipping method selection on product, cart, and checkout
- two shipping selection types: popup dialog, drop-down selection
- ability to customize shipping messages from the backend panel
- different modes for shipping calculation
*Added information about chosen shipping to the order editing page (admin)
*Added: Compatibility with WP 5.8 and WC 5.5
*Fixed minor bugs

*Fixed a javascript bug occurring in the image editor on the Import List page
*Refactoring several classes in the plugin code