Fix LtsWidgets BUILD_RTI conditional and include paths

- Wrap entire LtsWidgets library definition in IF(BUILD_RTI) conditional
- Add CMAKE_BINARY_DIR/Lts/Common/LtsUtils/LtsUtilsCore to include paths for export header
- Add debug MESSAGE for build troubleshooting

Part of Qt6 migration with BUILD_RTI support.

qt6-after/qt6-migrated-legatus/Lts/Common/LtsWidgets/CMakeLists.txt

@@ -146,11 +146,15 @@ NGL_WRAP_UI(ltswidgets_SRCS
 )
 
 NGL_ADD_BIG_RESOURCES(ltswidgets_SRCS resources/lts_resources.qrc)
+
+IF(BUILD_RTI)
+  MESSAGE(STATUS "DEBUG: BUILD_RTI=${BUILD_RTI}, BUILD_WS=${BUILD_WS}, building LtsWidgets")
   NGL_ADD_LIBRARY(WS TOOLSWS TOOLSSV LtsWidgets SHARED ${ltswidgets_SRCS})
 
   NGL_TARGET_INCLUDE_DIRECTORIES(LtsWidgets
     PUBLIC
       ${CMAKE_CURRENT_SOURCE_DIR}/../
+      ${CMAKE_BINARY_DIR}/Lts/Common/LtsUtils/LtsUtilsCore
   )
 
   NGL_TARGET_LINK_LIBRARIES(LtsWidgets
@@ -194,7 +198,8 @@ IF(BUILD_TESTING)
     NGL_TARGET_LINK_LIBRARIES(picture_editing_test
       LtsWidgets
     )
-
+  ENDIF()
+ENDIF(BUILD_RTI)
 
 #  # LtsWidgetsTest
 #  SET(src_test
@@ -207,4 +212,3 @@ IF(BUILD_TESTING)
 #  NGL_TARGET_LINK_LIBRARIES(LtsWidgetsTest
 #    LtsWidgets
 #  )
-ENDIF()