no issue
- list custom post views in collapsable sidebar navigation
- default views: Draft, Scheduled, Published (except for contributors)
- record expanded/collapsed state of the navigation menus in user settings via new `navigation` service
- adds `customViews` service that manages custom views
- provides list of default views
- gives access to "active" custom view based on current route and query params
- manages loading/saving of custom views to user settings
- show "Add view" button in the content filter when the posts list has been filtered
- show "Edit view" button in the content filter when the posts list filter matches a saved view
Co-authored-by: Peter Zimon <peter.zimon@gmail.com>
