Change 'quick-move-action-fix' to default disabled.

This is until we can ensure no bugs happen with it if we're required to release.
See #780

bukkit/src/main/java/us/myles/ViaVersion/bukkit/platform/BukkitConfigAPI.java

@@ -167,7 +167,7 @@ public class BukkitConfigAPI extends Config implements ViaVersionConfig {
     
     @Override
     public boolean is1_12QuickMoveActionFix() {
-        return getBoolean("quick-move-action-fix", true);
+        return getBoolean("quick-move-action-fix", false);
     }
 
     @Override

bukkit/src/main/java/us/myles/ViaVersion/bukkit/providers/BukkitInventoryQuickMoveProvider.java

@@ -44,6 +44,9 @@ public class BukkitInventoryQuickMoveProvider extends InventoryQuickMoveProvider
         if (!supported) {
             return false;
         }
+        if (slotId < 0) { // clicked out of inv slot
+            return false;
+        }
         ProtocolInfo info = userConnection.get(ProtocolInfo.class);
         UUID uuid = info.getUuid();
         BukkitInventoryUpdateTask updateTask = updateTasks.get(uuid);
@@ -66,9 +69,6 @@ public class BukkitInventoryQuickMoveProvider extends InventoryQuickMoveProvider
         }
         InventoryView inv = p.getOpenInventory();
         short slotId = storage.getSlotId();
-        if (slotId < 0) { // clicked out of inv slot
-            return null;
-        }
         if (slotId > inv.countSlots()) {
             return null; // wrong container open?
         }

common/src/main/resources/assets/viaversion/config.yml

@@ -84,8 +84,8 @@ hologram-y: -0.96
 piston-animation-patch: false
 # Should we fix nbt for 1.12 and above clients in chat messages (causes invalid item)
 chat-nbt-fix: true
-# Should we fix shift quick move action for 1.12 clients (causes shift + double click not to work when moving items) (only works on 1.8-1.11.2 bukkit based servers)
-quick-move-action-fix: true
+# Experimental - Should we fix shift quick move action for 1.12 clients (causes shift + double click not to work when moving items) (only works on 1.8-1.11.2 bukkit based servers)
+quick-move-action-fix: false
 #
 #----------------------------------------------------------#
 #         1.9 & 1.10 CLIENTS ON 1.8 SERVERS OPTIONS        #