CF7 Live Preview v1.0.0

• Initial release.
• Form preview: the form from the editor, unsaved, styled by the theme, at mobile, tablet or full width.
• Validation testing: submit the previewed form to see Contact Form 7's own validation messages, including unsaved Messages-tab edits. Nothing is stored or sent.
• Email preview: Mail or Mail (2) composed with editable sample values. Nothing is sent.
• Works with add-ons that change a form's markup or validation, including unsaved Conditional Fields conditions.
• Settings: background colour of the form preview and the width it opens at.
• cf7lp_enqueue_preview_assets action, for themes that load form CSS only on certain pages.