Duotone Allow Color Inheritance

Implementing this will force everyone who is currently using Duotone into the new "inherited" feature. I would prefer to leave existing versions alone and allow users to "opt-in" to the inherited option so as not to break existing implementations.

@Daniel ok I think that can be accomplished by just inverting the Boolean setting logic.

I just noticed that maybe this description should be adjusted since the way this is implemented they don't inherit by default.

Looks good - I made an additional commit to disable the color pickers when the "inherit" option is enabled so users don't become confused when their color selections don't work.

I have merged this branch. Thanks!

@Daneil thanks for the addition looks good to me

This was the fastest Drupal Issue I have ever experienced THANK YOU!

Haha, thank you for the work!

Automatically closed - issue fixed for 2 weeks with no activity.