private void HandlePintaCoreActionsImageRotate180Activated (object sender, EventArgs e)
{
Document doc = PintaCore.Workspace.ActiveDocument;
PintaCore.Tools.Commit ();
doc.RotateImage180 ();
doc.ResetSelectionPaths ();
doc.History.PushNewItem (new InvertHistoryItem (InvertType.Rotate180));
}