Save null offset if equal to default

Author: NotRyken

common/src/main/java/dev/terminalmc/clientsort/client/gui/screen/edit/EditorScreen.java

@@ -471,7 +471,12 @@ public void onClose() {
      * Saves any altered values, then calls {@link EditorScreen#onClose}.
      */
     public void saveAndClose() {
-        buttons.getFirst().savePolicy(buttons.getFirst().offset, ignoredSlots);
+        buttons.getFirst().savePolicy(
+                buttons.getFirst().offset.equals(options().layoutOffset)
+                        ? null
+                        : buttons.getFirst().offset,
+                ignoredSlots
+        );
         Config.save();
         onClose();
     }