Followup: tokens for page title in SEO settings

Overview

Follow up to #3497000-13: SEO settings for Pages →

I generated some more pages and realized that in this case the token is visible in the field

I think we should implement one of two possible options because the tokens are not something we expect a content person to use or understand in most cases:

1. Keep the field empty and do not show the token value here (only override if value is provided)
2. Automatically generate the value as a preview of what it currently would be instead of showing the token. This should be updated in real time as the page title is being changed.

Proposed resolution

User interface changes