Create a delete button for events

[alexanderqchen]

Motivation

There's currently no way to delete an event through the UI. The only way to delete an event is to run a SQL query on the production database, which is a little dangerous and cumbersome.

To Do

• Create a delete button under the event description panel
  There should be 3 buttons on the panel: "Update", "Delete", and "Cancel" in that order. Make the delete button red and the Cancel button grey. Then endpoint for deleting an event already exists at DELETE /app/api/v1/event/:uuid?
• Make the delete button have a confirmation modal before actually deleting the event