Update Qwt finder to search the current macports location

cmake/FindQwt6.cmake

@@ -61,6 +61,7 @@ find_path(QWT6_INCLUDE_DIR qwt.h
                c:\\libs\\qwt-6.1.0
                c:\\libs\\qwt-6.0.2
                c:\\libs\\qwt-6.0.1
+               /opt/local/libexec/qt5/lib/qwt.framework/Versions/6/Headers/
                #PATH_SUFFIXES qwt qwt6 qwt-6.1.0 qwt-6.0.2 qwt-6.0.1 include qwt/include qwt6/include #deactivated for acg dir
                ENV PATH
                )
@@ -125,6 +126,7 @@ if (QWT6_VERSION_FOUND)
     if (NOT QWT6_LIBRARY) # if not the specific acg qwt installation was found, try system wide
       find_library(QWT6_LIBRARY NAMES qwt
         PATHS
+        /opt/local/libexec/qt5/lib
         /usr/local/qwt/lib
         /opt/local/lib
         /usr/local/lib