Show Time in All Date Fields, and Add Time Selectors

Is your feature request related to a problem? Please describe.
I see that you can click to “Include time” on date columns within sets, but it seems that’s the only way to look at and change the time within date fields/relations.

Describe the solution you’d like
It’d be useful to also have this option when adding date relations to a canvas, and within the relations panel. Lastly, also a time selector interface! So I don’t have to type out the times

Describe alternatives you’ve considered
Another thing I found odd was the default “Time” relation was just a number. It seems there isn’t a Time datatype for relations yet. This feature could be useful for just thinking about times without having dates associated with them, and a similar datatype (although semantically different) can also be used for durations too.