Canvas Student

- Added support for Discussion Checkpoints in Calendar.
- Improved course file authentication.
- Mastery LTI tool is now in the side menu.
- Hidden New Quizzes are now not displayed in the Grades list.
- Fixed a bug, where discussion mention alerts couldn't be opened.
- Fixed a bug in the inbox.
- Fixed an issue where embedded video urls would not open.
- Handle 0 value in assignment reminder custom dialog.