Make "merged" take precedence over "unpushed"

Previously, when rebasing a branch onto a newer master, all commits from the
previous fork point up to its head were marked red (unpushed), including the
commits that are on master already. While this is technically correct from the
perspective of the current branch's upstream, it's not what most people expect,
intuitively; they want to see where the current branch starts, relative to
master. So all commits of master should be green, and then the commits of the
current branch in red.

pkg/commands/git_commands/commit_loader.go

@@ -357,7 +357,7 @@ func (self *CommitLoader) setCommitMergedStatuses(refName string, commits []*mod
 		if strings.HasPrefix(ancestor, commit.Sha) {
 			passedAncestor = true
 		}
-		if commit.Status != models.StatusPushed {
+		if commit.Status != models.StatusPushed && commit.Status != models.StatusUnpushed {
 			continue
 		}
 		if passedAncestor {