Description

In the Shadow Preset panel, the Add Shadow button slightly shifted to the right:

This is because the button is squashed and and no longer 24px wide:

We can probably fix this by looking at the implementations of other panels.

Step-by-step reproduction instructions

• Appearance > Editor > Global Styles > Shadows > Custom section
• Focus the Add Shadow button

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure