Do not modify saveOptions argument since it may be used again

If we add the notifier queue, another save function will use that queue
but not necessarily know that it needs to commit. Instead, we only use
the notifier queue for this function.

chrome/content/zotero/xpcom/attachments.js

@@ -562,8 +562,8 @@ Zotero.Attachments = new function(){
 			attachmentItem.attachmentPath = 'storage:' + options.filename;
 			await attachmentItem.saveTx(
 				Object.assign(
-					options.saveOptions || {},
-					{ notifierQueue }
+					{ notifierQueue },
+					options.saveOptions || {}
 				)
 			);