This is part of #3956 and shows how many commits your branch has diverged from other branches

User Flow to check functionality:

• click on compare tab
• click into the "compare a branch..." input and see a list of branches
• for each branch, see the # of commits that branch is ahead and behind your current branch
• start typing the name of an existent branch in "compare a branch..." input
• see the same #s for ahead/behind without recalculating

Changes:

• # of commits your branch is behind \/ that branch
• # of commits your branch is ahead ^ that branch

Other pieces:

• clicking on a branch to compare is in [RBB] Compare to Branch #3967

Before:

(branch list in app for reference)

After: