[ticket/12431] Add has_poll icon to topiclists

PHPBB3-12431
[ticket/12431] Add topic poll icon.

PHPBB3-12431
Merge pull request #4 from prototech/ticket/12431

[ticket/12431] Add topic poll icon.
[ticket/12431] Lang full sentence

PHPBB3-12431
Merge pull request #2340 from PayBas/ticket/12431

[ticket/12431] Add has_poll icon to topiclists

* PayBas/ticket/12431:
  [ticket/12431] Lang full sentence
  [ticket/12431] Add topic poll icon.
  [ticket/12431] Add has_poll icon to topiclists