Show groups of matches in bubbles instead of with dividers

Instead of horizontal dividers between groupings in the list of possible matches, consider using CSS background images to create rounded boxes around each group – i.e., first-in-group rows get a background with top rounded corners and a little space at the top, last-in-group rows get a background with bottom rounded corners and a little space at the bottom, and all other rows get a background that spans the height of the row.