/// <summary>
/// start synchronisation of link and update button
/// </summary>
/// <param name="l"></param>
void StartSync(SyncLink l)
{
label_p.Visible = true;
label_p.Text = @"0";
progressBar_total.Visible = true;
progressBar_total.Value = 0;
l.Sync(null);
StartUpdatingSyncInfo();
if (_selectedLink == l)
StartUpdatingSelectedSyncLinkInfo();
}
