Ton's of stuff is built into Kendo - we only legitimately access a portion of it through what Vlad gives us.
Well, there used to be drag and drop functionality on standard queries which has been removed in the newer versions for some reason (as already mentioned) AND the fact that you can do drag and drop on a calendar styled query, means this functionality is in place, it's just not available in the configurator.
So maybe there is not much work to be done here, it just needs to be exposed again in the configurator, maybe in the next update
Support, please could you comment on this and confirm it is possible.