New Non-Class Meeting Modal

[chrxr]

New non-class meeting modal:

• Modal accessible by button above the non-class meeting table.
• Contains the following fields:
  • Title (required)
  • Expected size (int)
  • Area dropdown, populated by areas (required)
  • Contact name (string)
  • Contact email (email)
  • Contact telephone (tel)
  • Notes (string)
• Clicking "save" in the modal add a new non-class meeting top level object to the database and updates the table with the new meeting.
• On success, displays success message in the global message component #369 .
• Closing the modal with unsaved changes should display the "unsaved changes" alert as with room booking modal / instructors modal. (Hook implemented in #419)

Validation

• Should use the same validation UI as used in the Course admin modal.
• Should also utilize the generic mark one modal message component to display non-field specific server-side errors, as well as the general "check fields" validation error. Look to course admin modal for wording.

[chrxr]

Do we need to keep old semester non-class meetings? Is there a need to see back in time? Do we need to be able to retire non-class meetings, or can they just be deleted? Would the delete button go into the edit modal?

[chrxr]

Check whether we already have non-class meeting endpoints, otherwise we'll create a new ticket.