Experimental flag in CMakeLists of Manhattan style to suppress windows warning

GUI/externals/qt-manhattan-style/CMakeLists.txt

@@ -53,6 +53,15 @@ set(SRCS
     extensions/threelevelsitempicker.cpp
 )
 
+if(MSVC)
+foreach (flag_var
+         CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+         CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+
+    string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")
+endforeach()
+endif()
+
 set(include_dirs ${CMAKE_CURRENT_SOURCE_DIR})
 include_directories(${include_dirs})