[view] simple grade types
[model] simple grade types & simple grade relations
[model/spec] simple grade types & simple grade relations
[locale] simple grade type
[controller] simple grade type controller
[spec/controller] simple grade type
[routing] simple grade types
[spec/routing] simple grade types
[spec/feature] simple grade types views
migrations
[view] simple grades
[controller] simple grades
[spec/controller] simple grades
[spec/features] simple grades
[decorator] change student simple grade list
[model] simple grades delegate methods to return simple grade type attributes
[fix] badge types
[remove] flash check in simple grade modal crud
[spec/features] little refactor
[trait] change from class group factory to trait file