qml: use declarative form for invoiceResolved and requestResolved in WalletMainView

(cherry picked from commit 78b2e3df6c47ad5d5d119cbc2372e62807f372fd)

electrum/gui/qml/components/WalletMainView.qml

@@ -386,9 +386,12 @@ Item {
             dialog.open()
         }
 
-        Component.onCompleted: {
-            piResolver.invoiceResolved.connect(invoiceParser.fromResolvedPaymentIdentifier)
-            piResolver.requestResolved.connect(requestDetails.fromResolvedPaymentIdentifier)
+        onInvoiceResolved: (pi) => {
+            invoiceParser.fromResolvedPaymentIdentifier(pi)
+        }
+
+        onRequestResolved: (pi) => {
+            requestDetails.fromResolvedPaymentIdentifier(pi)
         }
     }
 

electrum/gui/qml/qepiresolver.py

@@ -17,8 +17,8 @@ class QEPIResolver(QObject):
 
     busyChanged = pyqtSignal()
     resolveError = pyqtSignal([str, str], arguments=['code', 'message'])
-    invoiceResolved = pyqtSignal(object)
-    requestResolved = pyqtSignal(object)
+    invoiceResolved = pyqtSignal([object], arguments=['pi'])
+    requestResolved = pyqtSignal([object], arguments=['pi'])
 
     def __init__(self, parent=None):
         super().__init__(parent)