Implement Loading (#9) (#11)

* Not working; Set content manager level

* Set content manager level

* More trying around

* Update bug description

* More fooling around

* Update bug coment

* Fully implement loading.

Change how files are copied. (Maybe changing it again, I have an idea)
This also changes the blocking behaviour while a save is loaded.
Change loading menu label.

* Make fields static and init once

Untested

* What are static constructors

* Remove evenFlags set

It was in fact unneeded