Fixed issue #2719: Commit & Push in CommitDlg doesn't respect deafult remote and pushbranch settings
Code moved from CPushDlg::GetRemoteBranch to CGit::GetRemotePushBranch
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Code moved from CPushDlg::GetRemoteBranch to CGit::GetRemotePushBranch