refs. https://github.com/TryGhost/Team/issues/205
Major update to Ghost Admin UI including:
- improved general consistency (typography, colors and contrast, UI components, icons)
- new design for post and pages lists, improved discoverability of filters
- search moved to modal
- account menu is decoupled from ghost logo
- further usability fixes
no issue
- added `page` model
- removed `page` param from Post model
- added pages screen with associated links
- added `:type` param to editor screens to work with the right models
- removed post<->page toggle and associated tour item