* Move ancestors/descendants out of timelines reducer
* Refactor timelines reducer
All types of timelines now have a flat structure and use the same
reducer functions and actions
* Reintroduce some missing behaviours
* Fix wrong import in reports
* Fix includes typo
* Fix issue related to "next" pagination in timelines and notifications
* Fix bug with timeline's initial state, expandNotifications
* Add load more button for large screens
* Fix `next` state value on the first loading
* Don't load if `isLoading || !hasMore`
* Start load on near the bottom
Yamagishi Kazutoshi