Fixed the main things which went wrong with predefined scopes.
But there's still a problem: The "none" prompt in information_type#edit
view won't work if there's already a predefined_scope.
(=> If your i_type already has a scope, you don't have the possibility to
select no scope in edit)
Fixed main issues with info_type_decorator.
Fixed the info_type_edit view.
Found a bug in "method_missing" (i_type_decorator).. But it's still not
working.
seems to work.
Merge branch 'master' of github.com:pse3/SGfM into fix_predefined_scopes