Added wxWindow::CanScroll() with the old HasScrollbar() meaning but changed HasScrollbar() to check for the scrollbar existence instead of just checking if it might exist. Closes #10897. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61634 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775