Add a note about the ui object passed to events when it contains no properties

[tjvantoll]

Let me know if there's a better way to implement the xsl here. I'm guessing there is. This does work though.

[scottgonzalez]

Since this is a widget event, we can just assume that there is always a ui argument. Mobile uses the same name for their data object.

[scottgonzalez]

I think we can just drop the first condition and land this.

[tjvantoll]

I dropped the condition a08c9eb. If we ever have an event without a ui argument this message will be spit out, but if that day comes we can add the guard back in.

I can't rebase / land this because I don't have rights for this repo.

[scottgonzalez]

Landed in 151d7ce.

If we ever have an event without a ui argument this message will be spit out, but if that day comes we can add the guard back in.

If that ever happens, the consistency is lost and the note becomes meaningless everywhere :-P