Merge feature/lift-lts-viewer-module-upto-qt6 into feature/regression-arcgis300-symbology-migration

- Integrated LTS viewer module with Qt6 migration
- Resolved all merge conflicts by keeping current branch versions
- Preserved existing Qt6 migration fixes

qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/ElevationMap/situationmapelevationmap_export.h

@@ -0,0 +1,21 @@
+/**
+  * Export definitions
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+#pragma once
+
+#include <qglobal.h>
+
+#ifndef SITUATIONMAPELEVATIONMAP_EXPORT
+# ifdef BUILD_STATIC_LIBRARIES
+#  define SITUATIONMAPELEVATIONMAP_EXPORT
+# else
+#  if defined(MAKE_SITUATIONMAPELEVATIONMAP_LIB)
+#   define SITUATIONMAPELEVATIONMAP_EXPORT Q_DECL_EXPORT
+#  else
+#   define SITUATIONMAPELEVATIONMAP_EXPORT Q_DECL_IMPORT
+#  endif
+# endif
+#endif