[ticket/13163] Fix responsive link lists

PHPBB3-13163
[ticket/13163] Terminate timely when no data-last links exist

PHPBB3-13163
[ticket/12796] Add view own profile to UCP (and vice versa)

PHPBB3-12796
[ticket/12796] Use &amp; in path

PHPBB3-12796
[ticket/13163] Check for images

PHPBB3-13163
[ticket/12796] Use dedicated lang vars

PHPBB3-12796