Fixes publish date being reset when publishing a draft.
Fixes the schedule date not setting the fake publish date when scheduling a new content immediately.
Changes PageFilter to emit the no-cache headers when in preview or user is logged in instead of just the former.
Adds the ability to preview by date.
Fixes $.sortable items not allowing scrolling within.
Fixes search query text resetting on type change.
Merge branch 'release/2.3'