Ability to send Arbitrary Commands in Scenes

[roger1818]

I would like the ability to send an arbitrary command in a scene.  At a minimum you should be able to send Housecode All-Lights-On and All-Units-Off (possibly All-Lights-Off as well).  It would also be nice to be able to send any other arbitrary command as well, though that isn't as important.

[Noam]

Being able to send arbitrary commands (A unit code without an "on" or "off", for example) would help when trying to program those devices that get programed using those types of commands.