[ticket/12638] Use require if phpbb_require_updated isn't available

PHPBB3-12638
[ticket/12646] Add data-f attribute to breadcrumb links

PHPBB3-12646
[ticket/12646] Changed index/home data attr & updated subsilver

PHPBB3-12646
[ticket/11711] Inform user of unsupported characters while posting

PHPBB3-11711
[ticket/11711] Improve checks for unsupported characters and check subject

PHPBB3-11711
[ticket/11711] Reduce size of tests and also test topic titles

PHPBB3-11711
[ticket/12680] Adds alternative text to contact icon in viewtopic.php

PHPBB3-12680
[ticket/12680] Adds second alternativ text and font-size: 0 to remove text

PHPBB3-12680
[ticket/12646] Add check for navlinks.FORUM_ID

PHPBB3-12646
[ticket/12646] Changed to navlinks.MICRODATA

PHPBB3-12646
[ticket/11711] Improve coding and comments of character check

PHPBB3-11711
[ticket/12680] Adds alternativ text with new variable to contact:

PHPBB3-12680
[ticket/12680] Removes unnessesary $user->lang from CONTACT_USER

PHPBB3-12680
[ticket/12563] Changes 2 language variables to better understandable names

PHPBB3-12563
[ticket/12563] Removes strintf in acp_styles.php and shorts up <a>

PHPBB3-12563
[ticket/12699] Add tab key to keymap

PHPBB3-12699
[ticket/12705] Break calling make_clickable with a different server_url

PHPBB3-12705
[ticket/12705] Store the regular expression matches based on server_url

PHPBB3-12705
[ticket/12563] Removes ending . from <a>

PHPBB3-12563
[ticket/12680] Little changes, but some issues are still there

PHPBB3-12680