Change default value of settings.shadow.defaultPresets to false

[t-hamano]

This PR is a follow-up to #6178.

The original Gutenberg PR had a change made to theme.json, but #6178 did not include it.

Trac ticket: https://core.trac.wordpress.org/ticket/60633

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[vcanales]

Thanks for catching this. LGTM

[madhusudhand]

I apologize for the oversight in the initial pull request. I've reviewed the changes, and they look good to me. Thank you for taking care of this.

[swissspidy]

What are the testing instructions for this?

[youknowriad]

The testing instructions should be something like:

• Use a classic theme that doesn't have a theme.json or doesn't have appearanceTools: true in its theme.json.
• The shadow controls shouldn't appear on the inspector control (sidebar) of the button block.

[swissspidy]

Thanks @youknowriad, I can confirm this then 👍

[t-hamano]

• Use a classic theme that doesn't have a theme.json or doesn't have appearanceTools: true in its theme.json.
• The shadow controls shouldn't appear on the inspector control (sidebar) of the button block.

Thank you. This is correct.

[swissspidy]

Committed to trunk in https://core.trac.wordpress.org/changeset/57827

Needs double sign-off (dev-reviewed) from another committer for backporting to 6.5

[youknowriad]

Added the "dev-reviewed" tag. This LGTM