R1:29f625ef6882

Make "No Notifications" setting less broad, and fix a bug with default display behavior

Summary:
Fixes T12979. In D18457, we added a "No Notifications" setting to let users disable the blue and yellow pop-up notifications that alert you when an object has been updated, since some users found them distracting.

However, the change made "do nothing" the default, so all other `JX.Notification` callsites -- which never pass a preference -- were effectively turned off no matter what your setting was set to.