Improvements

[Abdullah Hulayyil]

• Enqueue https://pay.google.com/gp/p/js/pay.js script only if google pay is enabled.
• Add support for any custom checkout fields in ApplePay JS, for example we have a field with name mobile/email which breaks ApplePay popup from working, 1 line fix added to the applepay filed fixed it: if(name === 'mobile/email') { return true; }
• Show Fawry even if current currency is not EGP, our store supports multiple gateways we don't use EGP as main currency, but we have a converter that makes currency switch to EGP upon Fawry selection. This way we're supporting multiple currencies. issue found in if ($value == 'fawry' && $currencyCode == 'EGP' && $countryCode == 'EG') {
• Remove shipping label in ApplePay popup unless shipping is set.
• Add discount label in ApplePay popup if exists.
• Add fees label in ApplePay popup if exists.
• Add tax label in ApplePay popup if exists.