Role access to actions & important updates

Summary

ee26734 Add loading gif and fix some issues (#130)
f5ff3f6 Fix forms (#129)
016848b Add restric info/actions and paths logic (#128)
1ecfde0 remove grades update due to the following reasons: (#127)
9992034 add 204 no content when finishing creating all the final grades of the students of a final inscription (#126)
af5239b Created CoursesFinalInscriptionsClose Method (#125)
8075a8d Add Error Messages for Enroll, FinalEnroll and AddCorrelative Modals (#123)
9da368a Add courses students & final inscriptions qualify (#124)
ad79540 Fixes for massive load of student grades and permissions in Spring Security (#122)