In QSO logging, don't refresh callsign data if it's not changed

assets/js/sections/qso.js

@@ -1,3 +1,5 @@
+var lastCallsignUpdated=""
+
 $( document ).ready(function() {
 	setTimeout(function() {
 		var callsignValue = localStorage.getItem("quicklogCallsign");
@@ -540,10 +542,14 @@ function resetTimers(manual) {
 }
 
 $("#callsign").focusout(function() {
-	if ($(this).val().length >= 3) {
-
 	// Temp store the callsign
 	var temp_callsign = $(this).val();
+	if (temp_callsign == lastCallsignUpdated) {
+		return;
+	}
+	lastCallsignUpdated = temp_callsign;
+
+	if ($(this).val().length >= 3) {
 
 		/* Find and populate DXCC */
 		$('.callsign-suggest').hide();