Agreed. I think we shouldn't select anything by default: it's just one of those things that slipped by us in the rush over the past couple of weeks. Also, GO isn't in the candidate list, which is actually quite annoying. We'll get both of those fixed.
USE tempdb
GO
Hit Enter.
Result on my screen:
USE tempdb
GOTO
I don't think the selection should be auto-highlighted when the popup comes up...