Warning: React does not recognize the isButton prop on a DOM element.

[amdrew]

Latest master branch.

Describe the bug

When inserting a paragraph block and then opening the Color Settings panel, the following error appears in the browser console:

Warning: React does not recognize the `isButton` prop on a DOM element. If you intentionally want it to appear in the DOM as a custom attribute, spell it as lowercase `isbutton` instead. If you accidentally passed it from a parent component, remove it from the DOM element.

To Reproduce
Steps to reproduce the behavior:

1. Insert a paragraph block
2. Click on the Color Settings panel to open the color settings
3. View the browser's console
4. See error above

Expected behavior
No error when switching to the color settings panel.

[amdrew]

PR: #9786