Fixed styling of related cards on iPad edition

This fixes the appearance of related items cards on the iPad edition; aligning them side by side, removing bylines and truncating headlines when needed. It also fixes the markup to place them within the appropriate container (the lack of which was breaking the nth-child padding functionality).

It also seems to have the changes from the previous pull request I made, which fixed the scrolling of cards. For some reason it doesn't seem to have been merged.