private void removeChannelButton_Click(object sender, EventArgs e)
{
if (channelsList.SelectedIndex >= 0)
{
ChannelItem channelToRemove = (ChannelItem)channelsList.Items[channelsList.SelectedIndex];
Rule rule = rulesList.SelectedItems[0].Tag as Rule;
rule.Channels.Remove(channelToRemove.channel);
ArchiverMain.Current.ChannelsSettings.Save();
RefreshChannelsList();
}
}