carbon: fix titlebar button drawing by ThemeManager (paul)

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41875 4005530d-fff6-0310-9dd1-cebe43e6787f
TAChart: Add TDiaElement.IsPointInside function

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41876 4005530d-fff6-0310-9dd1-cebe43e6787f