Apple has debuted a major update to its web-based iCloud Photos app at iCloud.com, presenting a new user interface that more closely resembles the macOS Photos app. A new sidebar is enabled by default which provides more streamlined browsing of photo albums, although as in the corresponding macOS app, users can choose to toggle the sidebar off using a button at the top of the screen. Multiple photos can now be selected, and action buttons in the top-right…