remove duplicated sentence and a bit of light editing on radio.addressWidth docs
add debug log for hack to see if still needed
it seems that the module does re-trigger IRQ between queued-up reads, despite datasheet admonishing to manually check FIFO_STATUS. there was already a bit of straggler "checking" state, so just fill that (back) out to avoid problem where multiple corrupt messages would get pulled out of the FIFO