Description

When building a stacked pr where every PR should result in a deploy (for example for migrations), you make a PR that has another branch as it's base branch. It would be nice to have a link to the PR of that base branch, or even better all PR's in the stack (forwards and backwards)

Example URLs

There is a real case, but it in our private repo. It is also impossible to make a permanently available example since github will 'fix' the base branch of the stacked pr to be the base branch of the merged pr if the first branch of the stack is merged.
An example would look like this: