DRC Debugs - Actively query for unconfirmed DRs

Description

Right now the only way to confirm your availability for a design review is to click the slack link which takes you to the settings page and opens the modal. If slack or the link messes up, someone is unable to confirm their availability. Therefore, we want to actively check for unconfirmed design reviews on the home page, and pop open the confirm design review availability modal if the current user has any they need to confirm.

Acceptance Criteria

• Any unconfirmed design reviews for a user will cause a confirm availability modal to pop up when they enter the home page on FinishLine.
• If the user clicks cancel on the modal, it should close the modal, but reopen it if they come back to the page
• If the user submits, it should call the mark user confirmed endpoint like the current modal does now

Proposed Solution

You should be able to reuse the confirm design review availability modal we currently have, the trickiness from this one is going to come from determining on which design reviews a user is in the list of required members on a design review but not the list of confirmed members.

Start by locating the existing confirm design review availability modal and the mark user confirmed endpoint, then trace how the home page loads design reviews. Determine how to identify users in required members but not confirmed members. Done means the modal appears for qualifying users, canceling allows it to reappear on return, and submitting uses the existing endpoint.