This makes it easier to navigate between different blog sections: Customize, Stats, View.

instead of h2s. This also removes odd one-time class usages on Account
Settings page.

This changes all variables and functions from using Suspend{ed} to using
Silence{d} as well as documentation, errors and logging.

- update error messages to be correct
- move suspended message into template and include for other pages
- check suspended status on all relevant pages and show message if
logged in user is suspended.
- fix possible nil pointer error
- remove changes to db schema files
- add version comment to migration
- add UserStatus type with UserActive and UserSuspended
- change database table to use status column instead of suspended
- update toggle suspended handler to be toggle status in prep for
possible future inclusion of further user statuses

This ensures the "new post" link under each blog on the user Blogs page
goes to /new instead of /.

Ref T681