/// <summary>
 /// Mouse up event for the OpenGL window
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 void glControl_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
 {
     editorStateControl.SetIdle();
     Mouse.OverrideCursor = System.Windows.Input.Cursors.Arrow;
     oldMousePos          = new Vector2(-1, -1);
 }