Add a means to cancel/discard a pending review

Problem description

I've been experiencing issues with reviews having ~41 pending comments (see, e.g., #433461 (closed)). If I get into this state, the review stays in pending state and there's no way to get rid of it (i.e. preventing me from doing other reviews, or manually breaking the review up into smaller pieces).

I can imagine also other scenarios, where one would like to discard a review even without hitting these issues.

Solution

Add a button to the footer to discard the pending review.

• Icon destructive button
  • Icon: remove
• Tooltip: "Discard review"

When the button is pressed a modal opens to confirm the discard action

• Title: Discard pending review?
• Body: Are you sure you want to discard your pending review comments? This action cannot be undone.
• Secondary button: "Keep review"
  • Closes modal and does nothing else
• Destructive button: "Discard review"
  • Discards all pending review comments and clears summary text
  • Once done, a toast appears "Review discarded"

Icon danger button in footer	Confirmation of discarding