Variant details page layout update

Updated the Variant details page with a more intuitive layout, including moving the "Pricing" section to the top.

Country area field label update

Added "State/Province" to the country area field label to improve clarity.

SendGrid email suffix

You can now specify a template suffix in your SendGrid app settings, which will be appended to template names upon SendGrid activation.

For example, you can add a -staging suffix to identify staging emails when staging and production share the same domain.

Fixed an issue preventing seller staff members from viewing their seller account details page.

Fixed an issue preventing seller staff members from viewing products or variants in the Dashboard.

Fixed an issue where order line prices were not being displayed correctly on the Marketplace Order details page for products with sales or discounts.