show only valid qr codes with valid payment ids

fix broken amount field

remove unnecessary braces

remove bad pid string and whitespace changes

remove payment id check in qr generation

pages/Receive.qml

@@ -60,12 +60,18 @@ Rectangle {
 
         if (payment_id.length > 0) {
             integratedAddressLine.text = appWindow.currentWallet.integratedAddress(payment_id)
-            if (integratedAddressLine.text === "")
-              integratedAddressLine.text = qsTr("Invalid payment ID")
+            if (integratedAddressLine.text === "") {
+                integratedAddressLine.text = qsTr("Invalid payment ID")
+                paymentIdLine.error = true
+            }
+            else {
+                paymentIdLine.error = false
+            }
         }
         else {
             paymentIdLine.text = ""
             integratedAddressLine.text = ""
+            paymentIdLine.error = false
         }
 
         update()