Improve blending of legacy fixed element divisions with tessellation in cmgui, for correct migration of old gfx commands. https://tracker.physiomeproject.org/show_bug.cgi?id=3260
Improve blending of legacy fixed element divisions with tessellation in cmgui, for correct migration of old gfx commands. https://tracker.physiomeproject.org/show_bug.cgi?id=3260

cmiss/cmgui,cmiss/cmgui