Clearer wording, percentage pricing and cart compatibility fixes

Improvements

• Outdated wording has been removed from the app to keep text clear and up to date.

Bug fixes

• An issue where percentage-based add-on fees for file uploads were calculated incorrectly has been fixed. Percentages now apply as expected.

• We’ve resolved a compatibility issue with the Upcart—Cart Drawer & Upsells app that prevented add-on pricing from applying correctly in the cart drawer.