Steps to reproduce bug:
1. Type in a phrase that matches exactly 10 contacts in your Thunderbird
2. Click the "See more..." link
Actual behavior: Nothing happens, since there are no more contacts that
Expected behavior: The "See more..." link should only appear if there
are more than 10 contact matches, not if there are exactly 10 matches.
Additional comment: There is probably a good chance this bug also exists
for other contacts sources besides Thunderbird (such as "Google
Contacts", Microsoft Outlook "Address book", and "LDAP configuration").