Ability to copy hyperlinked list of stacked PRs

[jake-fine-il]

I'll typically copy the title of a PR which natively hyperlinks it so I can post it in slack/elsewhere. Would love the ability to easily copy the list of PRs in the stack so I can paste it like so:

1. this is a pr (# 1)
2. this is another pr (# 2)
3. and another (# 3)

[jgable]

I would like to be able to easily copy a list of links to each PR in a stack in markdown format. You could add a button next the close and clear stack icons.

This would help me share the stack with my team when I need reviews.

[pior]

This is a tiny feature, but it's absolutely needed.

We are posting our stacks on Slack everyday.