Rebase button for Bitbucket Server (paid add-on)

Here's my business model: go through the top-voted bugs in Atlassian's bug tracker and solve them one by one (I've done 3 of the top 10 so far): https://jira.atlassian.com/issues/?jql=project%20%3D%20BSERV...

Just kidding. But I don't think many people realize how flexible Atlassian's add-on architecture is. I can put my own Rebase button right there in the PR screen, with its own dialog, and integrate right into all the pre-existing pre-receive hooks and branch permissions.