[Courses] Multiple notes for student submission

[skrix]

Expected behavior:

• Open an admin panel
• Click on the hamburger menu
• Click on the Courses option in the menu list
• Click on the existing course in list
• Click on the Students tab in left sidebar
• Select the student
• Fill the add note form and press enter
• Page reloads and your note is added as separate note that you can edit or delete
• You can also see notes of the other mentors or administrators

Current behavior:

• Open an admin panel
• Click on the hamburger menu
• Click on the Courses option in the menu list
• Click on the existing course in the list
• Click on the Students tab in the left sidebar
• Select the student
• Fill the add note form and press enter
• The note rewrited because it's just a field in the student model

Proposed solution: Add Note model for notes and make it polymorphic

[aleksacastle]

@skrix I will take it