private void compareToBaseToolStripMenuItem_Click(object sender, EventArgs e)
{
var headCommit = GetSelectedRevisions().First();
using (var diffForm = new FormDiff(UICommands, this, _baseCommitToCompare.Guid, headCommit.Guid,
_baseCommitToCompare.Subject, headCommit.Subject))
{
diffForm.ShowDialog(this);
}
}