Added y-axis to wxPlot. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5548 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5483 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775