[ticket/12396] Add Template events viewforum_forum_name

PHPBB3-12396
[ticket/12396] Added missing viewtopic_topic_title_append

rebased for travis... again

PHPBB3-12396
Merge pull request #2297 from PayBas/ticket/12396

[ticket/12396] Add Template events viewforum_forum_name_append/prepend

* PayBas/ticket/12396:
  [ticket/12396] Added missing viewtopic_topic_title_append
  [ticket/12396] Add Template events viewforum_forum_name