TAChart: Implement a windows-only solution to copying a chart to the clipboard as windows metafile. Update wmf demo. (see: http://forum.lazarus.freepascal.org/index.php/topic,25985.msg158945/topicseen.html#new)

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46396 4005530d-fff6-0310-9dd1-cebe43e6787f