Vega-Lite: selection 'zero' issue

I have three potential issues here, and would appreciate guidance on if and how they should be split up:

1. When the range widget is set to 0 (pull all the way to the left), Vega-Lite seems to interpret this as an empty selection.
2. I would like to be able, from the spec, set an initial value for the selection (I can work around this using JS, after the fact).
3. I would like to be able to put a label on the widget without a Vega-Lite warning, this has already been raised in #3350. You can add a "name" field to the "bind" element - it works, but it raises Vega-Lite warnings.