foam.graphics.CView: Remove deprecated canvas property.
foam.graphics.CView: Remove deprecated canvas property.

mdittmer/foam,jlhughes/foam,foam-framework/foam,jlhughes/foam,foam-framework/foam,mdittmer/foam,foam-framework/foam,mdittmer/foam,foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,mdittmer/foam