Event End Date Pop-Up Selector Shouldn't Show Any Days Before Event Start Date

It would great to not show any dates before the event's selected starting date when selecting its end date (see attached image). I know a warning will display if a user accidentally selects an end date that's before the start, but from an interface standpoint I think blocking out the days would be better.

I think this was a consideration last year when 1.3 came out but if I recall it wasn't possible due to a java script issue. I wanted to see if it may be a feature in future releases.

Thanks.