Dependency List UI polish - add padding between name and version columns

The spacing between the Component name and Version columns in the Dependency List should be increased, since long component names can run up too close to the version numbers.

This could become more apparent once #10536 (closed) lands, since that adds another column to the Dependency List, meaning it's even more likely component names will wrap.

A gap of 16px was mentioned, but that probably should be reviewed.

cc @andyvolpe @dpisek