Color select debounce

The `ColorSelect` input component should have a debounce; the color updates as you're moving around in the browser color picker, causing a lot of unnecessary update events.

On that note: the change event *should* only be fired once the color dialog closes, but React [deviates from the standard](https://github.com/facebook/react/issues/6308#issuecomment-199223358) in this case, which is why the issue occurs. In addition to the debounce, we should consider re-implementing the standard DOM behavior, keeping a local value, and then emitting `onChange` when onBlur happens

Locate the TypeScript ColorSelect input component and inspect its change and blur handling first. Reproduce movement in the browser color picker, then resolve whether the completed behavior should use debouncing or standard DOM-style local-value and onBlur handling; done means updates no longer emit repeatedly while the dialog is open.

Written by the indexing model from the issue text.