Macworld A few details about iOS 18 have already leaked, but after Mark Gurman recently reported that the next iPhone update would be “one of the biggest iOS updates–if not the biggest–in the company’s history,” we’ve been eagerly awaiting some more information about the new interface and features. In a follow-up report, Gurman throws a bit of cold water on his earlier report, claiming that the update will focus more on features than a facelift. In his latest Power On newsletter, Gurman says Apple “is indeed working to update the design of iOS as early as this year,” but he doesn’t “believe it…