Commerce: Don't include CP assets in email preview

[billmn]

Description
In Email Preview, control panel assets are included. This can cause problems because the email template inherit CP's styles, showing an incorrect graphic result.

This is the source of a email preview:

To Reproduce
How, and what happened?

1. In the CP, create a new email in Commerce > System Settings > Emails
2. Set an empty template
3. In Email list, click on preview button

Expected behavior
Email Preview must not inherit the styles from the control panel.

Additional info

• Craft version: 3.5.10.1
• Commerce version: 3.2.6
• PHP version: 7.4.9

[lukeholder]

Thanks fixed for the next release.

[lukeholder]

To get the fix early, change your craftcms/commerce requirement in composer.json to:

"require": {
  "craftcms/commerce": "dev-develop#16c619bf440e77c77d7ba8d84ac8a94ab18d6adf as 3.2.6",
  "...": "..."
}

Then run composer update.