Partydragen Developments

Changelog:
- Added PayPal Subscription support
- Added Cumulative Pricing (Thanks to @Skizzles)
- Added featured products widget
- Added purchased products to latest puchases widget
- Added option to change payment status
- Renamed PayPal gateway to PayPalLegacy
- Renamed PayPalBusiness gateway to PayPal
- Fixed using identifier param in url as default value
- Fixed restore value on validation failure
- Alot of technical reworks and improvements
- Several languages updated thanks to @AMGewka @Fjuro @enno123 @reaching22

IMPORTANT: This update is a major update changing alot, Its very important you control and check if your gateways have successfully updated, especially the paypal webhook