Links added to contact summary with hook_civicrm_links() appear different from native links

If I use hook_civicrm_links() to add links to the Actions list in the Contact Summary page, these links appear different from the existing links in the list. Specifically, they're added as un-wrapped <a> elements after the <ul> of existing links, rather than wrapped in <li></li> within that list. This means they're aligned and colored differently, and behave differently on hover. (See attached screenshot).

This patch wraps such links into the existing <ul>, so they're styled like other links in the list.