[FEATURE "ember-routing-transitioning-classes”]

Disables eager URL updates during slow transitions in favor of new CSS
classes added to `link-to`s (in addition to `active` class):

- `transitioning-in`: link-to is not currently active, but will be
  when the current underway (slow) transition completes.
- `transitioning-out`: link-to is currently active, but will no longer
  be active when the current underway (slow) transition completes.
Merge pull request #9919 from machty/transitioning-classes

[FEATURE "ember-routing-transitioning-classes”]
[FEATURE] Revert ember-routing-will-change-hooks
[FEATURE] Revert ember-routing-handlebars-action-with-key-code
[FEATURE] Revert ember-runtime-item-controller-inline-class.
[FEATURE] Revert event-dispatcher-can-disable-event-manager.
Merge pull request #9984 from rwjblue/revert-features

Revert features that are no longer in the proper direction.
Make Router.map callbacks invoke after application boot.