Reset to Default Value Button + Indicator

[shancarter]

On inputs, would be nice if they:

1. Indicated if they were no longer in their default value state.
2. Offered a way to reset back to the default value.

In the mockup, the value for neighbors has been changed from its default value by a reader. If you refreshed the page, it would show a different value (the one specified in the code cell).

Allows readers to fiddle around with sliders and such, and then get back to how the author intended it to be viewed without doing a browser refresh of the whole page.

[shancarter]

The "reset" text could maybe also say: "reset to 7" but maybe that's too verbose?