Ultimate Membership Pro 12.8

- Improve {constants} date format
- Change Authorize payment workflow
- Fix Renew link for authorize payments
- Fix Single Level Link - Braintree payment
- Improve Storing Coupons process
- Improve overall Stripe payment workflow
- New Subscription table design and functions improvements
- Add 3 new Login Templates
- Add 1 new Register Template
- Add 3 new Account Page Templates

- Update Stripe API workflow based on the last requires
- Fix Notifications HTML content submission
- Fix Default WP Role for Pending approve action
- Improve Save Coupon functions
- Improve Pending Users login process

- Update the Product Verification process.
- Fix missing ID warnings over Register form fields