[ticket/12530] Fix captcha challange image breaking responsive layout

PHPBB3-12530
[ticket/12530] Show logo and policy in responsive

PHPBB3-12530
[ticket/13163] Fix responsive link lists

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

PHPBB3-13163
[ticket/12530] Combine logo and TOS link into one

PHPBB3-12530
[ticket/13163] Check for images

PHPBB3-13163
Merge pull request #3032 from PayBas/ticket/13163

[ticket/13163] Fix responsive link lists
Merge pull request #2938 from PayBas/ticket/12530

[ticket/12530] Fix captcha challange image breaking responsive layout