The copy button does not belong in the block content since it's UI and editor only. The button should be moved to the block toolbar.

There is currently no explicit test for the register_graphql_fields function. The register_graphql_field function does have tests, but it would be a good idea to explicitly test register_graphql_fields as well.

The list of AMP Caches is available at https://cdn.ampproject.org/caches.json

This could be pulled in dynamically rather than hard-coding each AMP Cache in \AMP_HTTP::get_amp_cache_hosts():

https://github.com/ampproject/amp-wp/blob/9e049f6554b69e06284ead57d13ef416226a51ec/includes/class-amp-http.php#L191-L239

This is low priority because the list of caches changes infrequently.

The buttons are stacking on top of each other.

Task Description

Work on the eyedropper feature is tracked in #262, and a prototype has been explored in #3007 — but it's still not implemented.

For this reason it's probably best to put the eyedropper behind a feature flag to prevent user confusion. Right now it's just a disabled button in the color picker.

<img width="223" alt="Screenshot 2020-08-18 at 20 09 44" src="https://user-ima