fix: after refreshing exchange rates pointInTime wasn't updated

Author: rsteimen

src/main/java/com/radynamics/dallipay/exchange/ExchangeRate.java

@@ -66,6 +66,10 @@ public ZonedDateTime getPointInTime() {
         return pointInTime;
     }
 
+    public void setPointInTime(ZonedDateTime pointInTime) {
+        this.pointInTime = pointInTime;
+    }
+
     @Override
     public String toString() {
         return String.format("pair=%s, rate=%s", pair, rate);

src/main/java/com/radynamics/dallipay/ui/ExchangeRatesForm.java

@@ -239,6 +239,7 @@ private void refreshRates() {
     private void apply() {
         for (var i = 0; i < rates.length; i++) {
             rates[i].setRate(getTxtValue(txts.get(i)));
+            rates[i].setPointInTime(ZonedDateTime.now());
         }
     }