Qt6 Migration: BUILD_RTI guards und CMake fixes

- BUILD_RTI conditional compilation für RTI Connext DDS dependencies
- Namespace fixes in core_dtc.h (Core:: → DDS::Core::)
- CMakeLists.txt: BUILD_RTI option und conditional dependencies
- Handler minelayer: namespace closing mit BUILD_RTI guard
- Build erfolgreich mit BUILD_RTI=OFF validiert

Signed-off-by: Torsten Wierschin <torsten.wierschin@life-maps.com>

qt6-after/qt6-migrated-legatus/Lts/Common/LtsTimelineClassic/TimelineView.cpp

@@ -149,7 +149,7 @@ void TimelineView::wheelEvent(QWheelEvent* event)
     if (QGuiApplication::queryKeyboardModifiers() != Qt::ControlModifier)
         return;
 
-    int scrolls = event->delta() / 120;
+    int scrolls = event->angleDelta().y() / 120;
 
     if (scrolls > 0)
     {
@@ -168,7 +168,7 @@ void TimelineView::mouseReleaseEvent(QMouseEvent* event)
 {
     QTreeView::mouseReleaseEvent(event);
 
-    QPoint position = event->globalPos();
+    QPoint position = event->globalPosition().toPoint();
     EventGraphic* eg = getEventOnPosition(position);
 
     if (!eg)