save -> saveAdditional

Also add in a janky workabround for handleUpdateTag not being called.
Being an early porter is always fun :D:.

src/main/java/dan200/computercraft/shared/computer/blocks/TileComputerBase.java

@@ -188,16 +188,15 @@ public abstract class TileComputerBase extends TileGeneric implements IComputerT
 
     protected abstract void updateBlockState( ComputerState newState );
 
-    @Nonnull
     @Override
-    public CompoundTag save( @Nonnull CompoundTag nbt )
+    public void saveAdditional( @Nonnull CompoundTag nbt )
     {
         // Save ID, label and power state
         if( computerID >= 0 ) nbt.putInt( NBT_ID, computerID );
         if( label != null ) nbt.putString( NBT_LABEL, label );
         nbt.putBoolean( NBT_ON, on );
 
-        return super.save( nbt );
+        super.saveAdditional( nbt );
     }
 
     @Override

src/main/java/dan200/computercraft/shared/peripheral/diskdrive/TileDiskDrive.java

@@ -137,9 +137,8 @@ public final class TileDiskDrive extends TileGeneric implements DefaultInventory
         }
     }
 
-    @Nonnull
     @Override
-    public CompoundTag save( @Nonnull CompoundTag nbt )
+    public void saveAdditional( @Nonnull CompoundTag nbt )
     {
         if( customName != null ) nbt.putString( NBT_NAME, Component.Serializer.toJson( customName ) );
 
@@ -149,7 +148,7 @@ public final class TileDiskDrive extends TileGeneric implements DefaultInventory
             diskStack.save( item );
             nbt.put( NBT_ITEM, item );
         }
-        return super.save( nbt );
+        super.saveAdditional( nbt );
     }
 
     void serverTick()

src/main/java/dan200/computercraft/shared/peripheral/modem/wired/TileCable.java

@@ -292,13 +292,12 @@ public class TileCable extends TileGeneric
         peripheral.read( nbt, "" );
     }
 
-    @Nonnull
     @Override
-    public CompoundTag save( CompoundTag nbt )
+    public void saveAdditional( CompoundTag nbt )
     {
         nbt.putBoolean( NBT_PERIPHERAL_ENABLED, peripheralAccessAllowed );
         peripheral.write( nbt, "" );
-        return super.save( nbt );
+        super.saveAdditional( nbt );
     }
 
     private void updateBlockState()

src/main/java/dan200/computercraft/shared/peripheral/modem/wired/TileWiredModemFull.java

@@ -241,13 +241,12 @@ public class TileWiredModemFull extends TileGeneric
         for( int i = 0; i < peripherals.length; i++ ) peripherals[i].read( nbt, Integer.toString( i ) );
     }
 
-    @Nonnull
     @Override
-    public CompoundTag save( CompoundTag nbt )
+    public void saveAdditional( CompoundTag nbt )
     {
         nbt.putBoolean( NBT_PERIPHERAL_ENABLED, peripheralAccessAllowed );
         for( int i = 0; i < peripherals.length; i++ ) peripherals[i].write( nbt, Integer.toString( i ) );
-        return super.save( nbt );
+        super.saveAdditional( nbt );
     }
 
     private void updateBlockState()

src/main/java/dan200/computercraft/shared/peripheral/monitor/TileMonitor.java

@@ -127,20 +127,26 @@ public class TileMonitor extends TileGeneric
         return InteractionResult.PASS;
     }
 
-    @Nonnull
     @Override
-    public CompoundTag save( CompoundTag tag )
+    public void saveAdditional( CompoundTag tag )
     {
         tag.putInt( NBT_X, xIndex );
         tag.putInt( NBT_Y, yIndex );
         tag.putInt( NBT_WIDTH, width );
         tag.putInt( NBT_HEIGHT, height );
-        return super.save( tag );
+        super.saveAdditional( tag );
     }
 
     @Override
     public void load( @Nonnull CompoundTag nbt )
     {
+        if( level != null && level.isClientSide )
+        {
+            // TODO: Remove once https://github.com/MinecraftForge/MinecraftForge/pull/8237 is merged.
+            handleUpdateTag( nbt );
+            return;
+        }
+
         super.load( nbt );
 
         xIndex = nbt.getInt( NBT_X );

src/main/java/dan200/computercraft/shared/peripheral/printer/TilePrinter.java

@@ -113,9 +113,8 @@ public final class TilePrinter extends TileGeneric implements DefaultSidedInvent
         ContainerHelper.loadAllItems( nbt, inventory );
     }
 
-    @Nonnull
     @Override
-    public CompoundTag save( @Nonnull CompoundTag nbt )
+    public void saveAdditional( @Nonnull CompoundTag nbt )
     {
         if( customName != null ) nbt.putString( NBT_NAME, Component.Serializer.toJson( customName ) );
 
@@ -130,7 +129,7 @@ public final class TilePrinter extends TileGeneric implements DefaultSidedInvent
         // Write inventory
         ContainerHelper.saveAllItems( nbt, inventory );
 
-        return super.save( nbt );
+        super.saveAdditional( nbt );
     }
 
     boolean isPrinting()

src/main/java/dan200/computercraft/shared/turtle/blocks/TileTurtle.java

@@ -289,9 +289,8 @@ public class TileTurtle extends TileComputerBase implements ITurtleTile, Default
         brain.readFromNBT( nbt );
     }
 
-    @Nonnull
     @Override
-    public CompoundTag save( @Nonnull CompoundTag nbt )
+    public void saveAdditional( @Nonnull CompoundTag nbt )
     {
         // Write inventory
         ListTag nbttaglist = new ListTag();
@@ -310,7 +309,7 @@ public class TileTurtle extends TileComputerBase implements ITurtleTile, Default
         // Write brain
         nbt = brain.writeToNBT( nbt );
 
-        return super.save( nbt );
+        super.saveAdditional( nbt );
     }
 
     @Override