UIActivityIndicatorView StartSpinner (UITableViewCell cell)
{
var cvb = cell.ContentView.Bounds;
var spinner = new UIActivityIndicatorView (new CGRect(cvb.Width-CSIZE/2, (cvb.Height-CSIZE)/2, CSIZE, CSIZE)) {
Tag = SPINNER_TAG,
ActivityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray,
};
cell.ContentView.AddSubview (spinner);
spinner.StartAnimating ();
cell.Accessory = UITableViewCellAccessory.None;
return spinner;
}