[ticket/12248] Make extension details homepage a clickable link

http://tracker.phpbb.com/browse/PHPBB3-12248

PHPBB3-12248
[ticket/12248] Remove p tag in favor of strong tag

PHPBB3-12248
[ticket/12248] Fix meta_author tags (IDs must be unique)

PHPBB3-12248
[ticket/12248] Use id instead of name attribute in a tags

PHPBB3-12248
[ticket/12248] Remove unused label for attributes and related id tags

PHPBB3-12248
Merge pull request #2086 from VSEphpbb/ticket/12248

[ticket/12248] Make extension details homepage a clickable link