ReceiveSet never terminates when it definitely should

[teh-cmc]

See this code:

rerun/crates/top/rerun/src/commands/entrypoint.rs

Lines 794 to 813 in cb657b8

	for rx in rxs {
	while rx.is_connected() {
	while let Ok(msg) = rx.recv() {
	if let Some(log_msg) = msg.into_data() {
	sink.send(log_msg);
	}
	}
	}
	}
	// TODO(cmc): This is what I would have normally done, but this never terminates for some
	// reason.
	// let rx = ReceiveSet::new(rxs);
	// while rx.is_connected() {
	// while let Ok(msg) = rx.recv() {
	// if let Some(log_msg) = msg.into_data() {
	// sink.send(log_msg);
	// }
	// }
	// }