U2 MD Select: Guard opening selector when mode is not read-write
U2 MD Select: Guard opening selector when mode is not read-write

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