[ticket/12446] Unnecessary db connect inphpbb_bootstrap_enabled_exts

PHPBB3-12446
[ticket/12788] Update symfony components

PHPBB3-12788
[ticket/12788] Force 2.3.* on symfony dependencies

PHPBB3-12788
[ticket/12808] Fix small gap between username and drop-down arrow

PHPBB3-12808
[ticket/12811] Fix padding/margin bug affecting bottom layout

PHPBB3-12811
[ticket/12811] Responsive adjustments to margin changes

PHPBB3-12811
[ticket/12813] Fix page-jump title lang and use input type=number

PHPBB3-12813
[ticket/12813] Reorder .row pagination so it aligns better

PHPBB3-12813
[ticket/12816] Fix comment about logs in user_ban function

PHPBB3-12816
[ticket/12807] Changes PRUNE_FREQ to PRUNE_SHADOW_FREQ/_DAYS

PHPBB3-12807
[ticket/12807] Adds missing language variables language/en/acp/forums.php

PHPBB3-12807
[ticket/12807] New variables for _EXPLAIN

PHPBB3-12807
[ticket/12813] Use -moz-only fix instead of generic padding

PHPBB3-12813
[ticket/12813] Move inline-CSS to css file

PHPBB3-12813
[ticket/12815] Show memberlist link for guests (if permitted)

PHPBB3-12815
[ticket/12815] Remove S_REGISTERED_USER for team link

PHPBB3-12815
[ticket/12823] Remove all trailing whitespace

PHPBB3-12823
[ticket/12810] Use correct template vars for shadow pruning settings

PHPBB3-12810
[ticket/12515] Remove check for PostgreSQL 8.3+

PHPBB3-12515
[ticket/12598] Use tweaks.css for IE9 border-radius fix

PHPBB3-12598