private void tuneAllChannelInMosaicToolStripMenuItem_Click(object sender, EventArgs e)
{
if (this.treeViewChannel.SelectedNode != null && this.treeViewChannel.SelectedNode.Tag is ChannelDVB)
{
ChannelDVB channel = this.treeViewChannel.SelectedNode.Tag as ChannelDVB;
MainForm.TuneChannelGUI((Channel)channel);
}
}