* Added filter 'wc_add_fees_subscriptions_remove_fees' - remove manually added fees (e.g. if our fees are added manually we do not recognise them)
* checked compatibility for WP 5.8 and WooCommerce 6.1
* Pay for order page fix: Force calculation of fees on pageload (WC has by default payment method N/A on new created orders in backend
* Add loading icon on "Pay for order page"