Clean students/student_specialties
Clean students/student_achievements
Clean students/simple_grades
Clean students/guardians
Clean students/course_enrollments
Clean teachers
Refactor soft_delete and recovery in controllers
Add nprogress bar
Fix nprogress issues
Clean class_groups
Clean syllabuses
Clean courses
Clean course_groups
Clean extracurricular_activities
Clean exams
Remove edit from index spec from requests/syllabuses_spec
WIP : Clean admin/schools
Refactor admin/schools
Fix spec/requests/avatar specs
Fix controller specs