Use simple and uniform list item layout in basic flavor

This addresses issue #2650 (closed).

I added a separate field for the app name to make the position of the summary field consistent between items and aligned with the name. This also gives a little bit more room for the summary, which is helpful for some of the less concise app summaries.

The summary field uses the primary text color because it's arguably the most important piece of information when browsing new apps, so I don't think it should be de-emphasized (which would make it harder to read).