Migrate `Scroller` configurations from static to instance properties and functions

Now that `uidCallback()` include the `Scroller` instance itself, this can be done.

- [x] Feed
- [x] MyNetwork
- [x] InvitationManager
- [x] Jobs
- [x] JobsCollections
- [x] JobsView
- [x] Messaging
- [x] Notifications
- [x] Profile
- [x] Events
- [x] SearchResultsPeople
- [ ] Make `scrollerClassName` and related instance methods
