QtCanvas3D: set some configs enforcing

These are passing.  Make sure they stay that way.

Change-Id: Id509b97e5b1126e093bb4e513220eebbbc2aec4d
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>