MasterStudy LMS PRO 4.6.18

- **Fix**: Students who have purchased a pre-ordered upcoming course can take the course via Curriculum.

- **Enhancements**: Added an option to display coowned courses in the instructor's public profile.
- **Enhancements**: Updated the view on the page of quizzes created with the Online Testing addon.
- **Fix**: Student progress is not displayed for the group creator.
- **Fix**: Student files from Assignments are displayed in the admin's media library.

- **Enhancements**: Added a new Certificate builder.
- **Enhancements**: Added sidebar for selecting certificate templates.
- **Enhancements**: Added ability to insert different elements such as course time, description, progress, etc.
- **Enhancements**: It is possible to add a certificate separately to a course or to a category of courses.