Close bld/OSG floor: OSG 3.4.1 from source + port osgQt to Qt6 + wire BgViewer dtEntity

Migrate BuildingViewer (16 files: DDS members, m_logger inits, QOpenGLWidget); gui:3:bld.info + gui:3:bdv now load

qt6-after/qt6-migrated-legatus/Lts/Plugins/BuildingViewer/Common/bdv_controller.cpp

@@ -10,6 +10,7 @@
 #include <LtsAppManager/lts_app_manager.h>
 #include <LtsPluginManager/lts_plugin_manager.h>
 #include <LtsSession/lts_session.h>
+#include <NGLLogger/NGLLoggerBootstrap.h>
 #include <QtCore/QDir>
 #include <QtWidgets/QMessageBox>
 #include <ngltools/ngltools_filesystem.h>
@@ -22,7 +23,8 @@ static char* argv_dummy[] = {(char*)"Dummy"};
 
 BgViewerController::BgViewerController(QObject* parent)
     : QObject(parent), m_mainloop(argc_dummy, argv_dummy, nullptr), m_widgetStolen(false), m_comIfc(nullptr),
-      m_pBgViewerDDSController(nullptr), m_bgvApp(nullptr), m_tickTimer(new QTimer(this))
+      m_pBgViewerDDSController(nullptr), m_bgvApp(nullptr), m_tickTimer(new QTimer(this)),
+      m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger().getNGLLogger("BuildingViewer.BgViewerController"))
 {
     m_tickTimer->setInterval(1000 / 25);
     connect(m_tickTimer, &QTimer::timeout, this, [this]() { m_mainloop.tick(); });