[ C7] Room Lighting: Null Pointer Exception

@gopher.ny I was just in the process of creating a Room Lighting App.

I'd just entered the "Name" then the "Command with Activator Device" name. Then, I was in the "Means to Activate Lights" (I'd selected a button) then clicked on "Activate Light Options" when it blew up with:

I had not yet selected ANY devices. It seems that trying to set this option with no devices set yet creates that error (it did it again--but stopped when I added 1 device).

Thanks. That error is caused by not having selected any devices to automate before that step. Fix will be in the next release.

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