First scratch of scene_debug..h/cpp
Second approach to SceneDebug.

First scratch of window_varlist.h/cpp
Add a call.
known issue: crashes when load scene_debug.
Add information to the windows.

Now variable values are readable (still not editable)
Hide Selection rect on Window_VarList when window is unactive.
Implement Switch edition.
Minor fixes

Delete unused variable.
Add missing chars to variable name rendering.
Implement Window_IntegerEditor.

Also Fix minimal bug.
Nicer approach to RM's behavior

Now LEFT and RIGHT buttons change range pages.
Add checks to prevent pointing to a wrong Switch/Variable.
EXTRA: OFF Switches and negative int variables have a different color.