Replaced sizer->Remove() with sizer->Detach() method call as the former is now deprecated in newer version of wxWidgets. Tracker item 2776, https://tracker.physiomeproject.org/show_bug.cgi?id=2776
Replaced sizer->Remove() with sizer->Detach() method call as the former is now deprecated in newer version of wxWidgets. Tracker item 2776, https://tracker.physiomeproject.org/show_bug.cgi?id=2776

cmiss/cmgui,cmiss/cmgui