* Add SlotFill area to header
* Add activity panel fill
* Move activity panel to root client folder
* Move activity panel registration to its own folder
* Add navigation fill
* Add page title slotfill
* Slot fill the back button
* Move mobile banner to slot fill
* Fix navigation fill on embed pages
* Add changelog entry
* Allow order prop to header item fill
* Split header into before and after
* Fix header title gaps
* Fix nav and mobile app banner placement
* Fix display options import
* Only use last item for page header title fill
* Use function to pass fill props instead of bind
* Rename header slots
* Fix mobile banner dismissal check
* Fix up inbox panel rename
* Update task title in tests
* Fix up task status retrieval
Fernando Marichal
Joshua T Flowers