message: Change new branch dialog default start point to the HEAD reference
  It was previously defaulting to the first branch in the reference list.
  Fixes
diff: @@ -34,6 +34,7 @@ NewBranchDialog::NewBranchDialog(
  mUpstream = new ReferenceList(repo, kinds, this);
  mRefs = new ReferenceList(repo, ReferenceView::AllRefs, this);
  + mRefs->select(repo.head());
  mRefs->setCommit(commit);
  mCheckout = new QCheckBox(tr("Checkout branch"), this);
  