Disable Settings App Default Option

* XE12 changed the way default apps are set. You cannot change the
  'default' settings app to launchy anymore. This option isn't really
  THAT useful anyway (I find it annoying). Now the only way to launch
  it is via "ok glass...run an app"
* I find it seems to 'flow' with the rest of the UI anyway, it doesn't
  seem to get in the way.