qml: FormattedAmount: also update fiat when the amount instance changes

electrum/gui/qml/components/controls/FormattedAmount.qml

@@ -41,9 +41,12 @@ GridLayout {
     }
 
     function setFiatValue() {
+        if (showAlt)
             fiatLabel.text = '(' + Daemon.fx.fiatValue(amount) + ' ' + Daemon.fx.fiatCurrency + ')'
     }
 
+    onAmountChanged: setFiatValue()
+
     Connections {
         target: Daemon.fx
         function onQuotesUpdated() { setFiatValue() }
@@ -56,8 +59,5 @@ GridLayout {
         }
     }
 
-    Component.onCompleted: {
+    Component.onCompleted: setFiatValue()
-        if (showAlt)
-            setFiatValue()
-    }
 }