replace color picked by color wheel

[halatmit]

from Aubrey's thesis:

We could replace the current 70-tone color picker with a wheel to allow users to choose more colors. It would also be good to show the color created as a thumbnail on the RGB color creator block.

[E-Hon]

I think #300 is related and I gave some suggestions there. Check out color input here

[ColinTree]

Implemented?

[ewpatton]

@mjgallag @josmas Now that we have plugins in Blockly, maybe we should switch the color field to use the HSV plugin to address this feature request. https://google.github.io/blockly-samples/plugins/field-colour-hsv-sliders/test/index.html

[mjgallag]

@ewpatton are you thinking pre or post #3588?

[ewpatton]

It could probably be either. Likely post so it doesn't also cause further changes to the v11 update.