Add source branch and hide common target branches in PR dashboard #235
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Justification
When looking at the PR dashboard, I frequently want to see the name of the source branch for a given PR. I also almost never care about the target branch, because it's usually just
mainormaster.Implementation
Add the source branch to all PRs. Hide the target branch (and related text and icon) if it's
mainormaster. Also abbreviate user branch names likeusers/kroeschl/footou/k/footo save space in the dashboard. Actually update the README and update notification.Testing
Viewed some PRs into


mainand a test PR into not-mainto verify rendering:Also verified that notification is updated and actually displays in browser: