fix bug where default pay from address was wrong

src/mainwindow.h

@@ -39,6 +39,8 @@ public:
 
     void updateLabelsAutoComplete();
 
+    void setDefaultPayFrom();
+
     Ui::MainWindow*     ui;
 
     QLabel*             statusLabel;
@@ -61,7 +63,6 @@ private:
     void setupStatusBar();
 
     void removeExtraAddresses();
-    void setDefaultPayFrom();
 
     Tx   createTxFromSendPage();
     bool confirmTx(Tx tx);

src/rpc.cpp

@@ -646,6 +646,10 @@ void RPC::updateUI(bool anyUnconfirmed) {
 
         ++i;
     }
+
+    if (lastFromAddr.isEmpty()) {
+        main->setDefaultPayFrom();
+    }
 };
 
 // Function to process reply of the listunspent and z_listunspent API calls, used below.

src/sendtab.cpp

@@ -17,8 +17,6 @@ void MainWindow::setupSendTab() {
     amtValidator->setNotation(QDoubleValidator::StandardNotation);
     ui->Amount1->setValidator(amtValidator);
 
-    setDefaultPayFrom();
-    
     // Send button
     QObject::connect(ui->sendTransactionButton, &QPushButton::clicked, this, &MainWindow::sendButton);