SWE-12 Navigation changes

- in order to avoid having a back button on the Payment Result screen, we present it modally and then pop to the root controller
- this gives the user a view with Cancel in the left corner, and a Home button. Tapping cancel will dismiss the modal, showing the Home screen

SynchronyFinancial/SynchronyFinancial WatchKit Extension/PaymentDetailInterfaceController.swift

@@ -39,10 +39,9 @@ class PaymentDetailInterfaceController: WKInterfaceController {
                 guard error == nil else { return }
                 self.dictForPayment.updateValue(confirmationNum, forKey: "payment_confirmation_number")
                 self.dictForPayment.updateValue(paymentID, forKey: "payment_id")
-                self.pushController(withName: "PaymentResult", context: self.dictForPayment)
+                self.presentController(withName: "PaymentResult", context: self.dictForPayment)
+                self.popToRootController()
             }
-
-//            popToRootController()
         } else {
 //            animate(withDuration: 0.75) {
 //                self.paymentButton.setBackgroundColor(UIColor.init(red: 141, green: 241, blue: 48, alpha: 1.0))