Lock Messages and getProp/setProp...

[Paul Dupuis]

I will periodically want to 'lock messages' so that preopen... and
open... handlers and the like do not fire as a handler is making
changes. However, I find that I WOULD like to use custom properties in
those handlers that have a getprop or setProp handler and the lock
messages prevents them from functioning.

Is it only me, or does anyone else wish there existed a:

lock messages except for properties

version of the lock messages command :-)