Changes

Rework screen event (#28)

* Use Fabric events instead of mixins

* Better event line

* Better type + event firing handling

* Fix creative inventory firing event for normal one

* Rewrite screen name handling

* Initialize `TYPE_MAP` first

* Use a mixin to support `context.switched`

* `switched` -> `previous_screen_type`

* creative screen is opened from inventory screen

* Shadow `currentScreen`

* Remove TODO

* Add `previous_screen_type` to meta

* Add `from` switch

* Clearer comment

* Use access wideners for `DetailsScreen`

* Clarify screen name generation with comment

* Fix typo

* Move screen name mapping to a separate class

* Move special case handling to the mixin
 (commit: c5559bf)