BRING BACK ATTRIBUTE SWAPPING

Revert attribute swapping changes In the last snapshot Mojang has completely REMOVED attribute swapping, and if not reverted, this could literally RUIN the whole pvp system and it would also change kits like Mace, UHC, Spear Mace etc drastically leading to a lot of people not updating the game and staying on an old version. DON'T REMOVE GOOD "BUGS" THAT HAVE BECOME FEATURES FOR THE COMMUNITY(like breaking the nether roof) (Edit: there is apparently a lot of more issues coming with this: "The order in which inputs are processed have changed from hotbar -> attack -> use to attack -> use -> hotbar, meaning every swap now carries an unavoidable 50ms delay before any action can occur. Shields and totems both inherit this delay on top of their existing latency because you can no longer use them immediately after swapping, for gamemodes like pot and nethpot your potions are thrown +50ms later. For Vanilla PvP, anchor speed goes from 150ms to 300ms, hit-crystal from 100ms to 200ms. Effectively every timing doubles for any hotbar action. On 30ms ping, players ghost around 60% of their inputs. Across the board, vanilla PvP is close to unplayable. Stun slamming goes from from 100ms to 200ms, using an axe goes to taking a full 100ms."