Adds latest migration results

qt6-after/qt6-migrated-legatus/Lts/Plugins/InfrastructureManagement/Shared/CMakeLists.txt

@@ -10,6 +10,14 @@
 #
 # Shared Tools for Ism Plugins & Foreign Plugins
 #
+# Make ${Qt6_Gui} optional
+if(QT6_GUI_AVAILABLE AND TARGET Qt6::Gui)
+  set(Qt6_Gui ${Qt6_Gui})
+else()
+  set(Qt6_Gui "")
+endif()
+
+
 NGL_ADD_LIBRARY2(WS IsmShared SHARED ism_mounting_point.cpp)
 NGL_TARGET_LINK_LIBRARIES(IsmShared
   Qt6::Core