REQUEST: Snap horizontal layout

When you have a lot of item in the horizontal layout, enough so that you have to swipe to see each item, it is a smooth scrolling process.

This is great, however we when use this layout to show an array of images, it deviates from standard practice where images snap into alignment if you swipe far enough... also there's a dot-based progress bar to go with it.

Having this type of layout to call in the framework would be awesome at replicating common interfaces found in other native apps.

No files or tests are named. Start by locating the existing horizontal layout entry point and reviewing how it handles image arrays and scrolling. Done should provide a reusable horizontal layout with item snapping and a dot-based progress indicator, matching the requested native-app behavior.

Written by the indexing model from the issue text.