Add header controller
Add menu controller
Minor refactors in menu(-item) view
Add regions for menus and search in header view
Add search API
Minor refactor in post collection
Minor adjustments in search view
Add support for displaying search results in archive controller
Use archive controller instead of triggering events
Add a no-style loading and minor adjustment in default done
Add new navigation method
Use new API & header controller
Naming things
Clean up code