Resolve "Future requests are not recorded"

name: Feature
about: New features or wider changes

Closes #116

Description

Adds a new page for the user to view upcoming visio requests, with an action to delete them.

Changelog

• Added new page with upcoming visio requests, ability to delete them #116
• Cancel termination email sending (i.e., 5 minutes before) when removing a current visio instance

How to test

• Create a few future requests
• After each creation, the app switches to the future requests page
• delete, the list is updated automatically
• After a visio has been started, the upcoming visio should not be in the list (requires reload)

Misc