Replace two include_directories with a setting.

Source/QtDialog/CMakeLists.txt

@@ -66,8 +66,7 @@ if(APPLE)
     MACOSX_PACKAGE_LOCATION Resources)
 endif()
 
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 add_executable(cmake-gui WIN32 MACOSX_BUNDLE ${SRCS})
 target_link_libraries(cmake-gui CMakeLib ${QT_QTMAIN_LIBRARY} ${QT_LIBRARIES})