closes: https://github.com/TryGhost/Ghost/issues/8292
- Title improvements:
- Clean up the connection between the editor and title.
- Encapsulate all title related events in the title component.
- Fix tab support.
- Fixed an issue where pressing up from an empty paragraph would select the title
- Ensure the empty content psuedo element is always below the cursor and make sure it always displays when the title is blank.