Migrates ./Lts/Viewer successfully to Qt6

qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/SymbologyXML/xml_symbol_codec.h

@@ -36,6 +36,7 @@
 
 #include <QtCore/QChar>
 #include <QtCore/QString>
+#include <QStringView>
 
 /**
  * \brief The SidcCodec namespace enables the encoding and decoding of a (base) symbol id of  xml symbols.
@@ -90,7 +91,7 @@ namespace SymbologyXML
                         , SymbolTypes::t_affil        &affil
                         , SymbolTypes::t_mob          &mob)
   {
-    QVector<QStringRef> tokenVector = encodedId.splitRef( QLatin1Char('-') );
+    auto tokenVector = encodedId.split(QLatin1Char('-'));
     if (tokenVector.size() == 5)
     {
       bool ok = false;