[ticket/12531] Restore default topic link functionality in subsilver2

PHPBB3-12531
[ticket/12531] Add some line breaks to really long lines

PHPBB3-12531
Merge pull request #2444 from VSEphpbb/ticket/12531

[ticket/12531] Restore default topic link behavior to subsilver2

* VSEphpbb/ticket/12531:
  [ticket/12531] Add some line breaks to really long lines
  [ticket/12531] Restore default topic link functionality in subsilver2