Complete Qt6 migration: full clean build green across groups G1-G12 incl. runtime plugin set

new_docker_build.sh gains Group 12 (212 GUI/Data plugins); fixes LtsUtilsGuiDds visibility (LTO-stripped exports), LtsProjectionWorkstation unity name shadow, 6 unity-off dirs (dup file-scope statics, ddsftc INTERFACE sources) and reconfigures BUILD_FILTERMANAGEMENT/BUILD_PLUGINS_SERVICEMONITOR=ON

qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/SymbologyXML/CMakeLists.txt

@@ -72,5 +72,6 @@ endif()
 
 NGL_INSTALL_TARGET(advancedSymbologyXML)
 
-# Gui subdirectory requires situationMapGeometryModel and advancedSymbology - deferred
-# ADD_SUBDIRECTORY(Gui)
+# Gui subdirectory (advancedSymbologyXML_Gui) — consumed by planEditor; its deps
+# (situationMapGeometryModel, advancedSymbology) are built, so enable it (legacy built it too).
+ADD_SUBDIRECTORY(Gui)