No visual feedback when a settings section is selected

When you tap on a settings section (such as "Updates") there is no visual feedback that the tap was recognized. For some sections (again like "Updates") there is a long enough delay between tap event and screen changes that the user often begins to wonder if the tap was recognized or not. Flashing a background highlight on the section icon/button when the tap happens, and before the process of loading the next screen begins, will assure the user that their selection was recognized.

<https://wiki.ubuntu.com/SystemSettings#navigation-feedback>: "All other items in the main screen should act as page stacks, regardless of whether they are list items (like “About this phone”) or grid items (like “Sound”). In particular:
 1. When you choose an item, the item should highlight until its screen appears.
 2. If that screen has not loaded within two seconds, a placeholder screen should appear with an empty header.
 3. If the actual screen still has not loaded after another three seconds, a spinner should appear in the center of the placeholder screen."