The matter is only being put on a back burner. It has not been settled. One of the benefits of  FPTP  is that from time to time there is a complete cleaning  out of party politics in Parliament with just small shifts of votes.  No party can get complacent  regardless of what they promise voters.   That's why Liberals hate it so much: they want to dominate Parliament even if they have to rig the electoral system to do it