Improve CRUD support for static pages

* Handle "built-in" page names correctly, including case-insensitive matching
* Allow adding pages that don't match a built-in name
* Fix ordering of links on page footer
* Remove StaticPage.title field. We're not using it and MikeT's wireframes have no UI for setting it.
Merge pull request #1165 from RickMohr/static-pages-again

Improve CRUD support for static pages