Update CommitsAhead CommitsBehind on Pull BaseBranch Change too (#11912)#11915

techknowlogick merged 2 commits intogo-gitea:release/v1.12go-gitea/gitea:release/v1.12from

6543-forks:backport_UpdatePullDiffOnBaseBrancheChange_119126543-forks/gitea:backport_UpdatePullDiffOnBaseBrancheChange_11912Copy head branch name to clipboard