[ticket/11552] Viewport meta for mobile devices

PHPBB3-11552
[ticket/11552] Add link to responsive.css

Add link to responsive.css and blank responsive.css

PHPBB3-11552
[ticket/11552] Basic rules for wrappers and header

Basic rules for content wrapper, common block wrappers and header

PHPBB3-11552
[ticket/11552] Add .nojs or .hasjs to body

Add .nojs to body element, swap it to .hasjs when
JavaScript is enabled

PHPBB3-11552
[ticket/11552] Responsive breadcrumbs

PHPBB3-11552
[ticket/11552] Responsive forums list

PHPBB3-11552
[ticket/11552] Move breadcrumbs up

Remove spacing between navigation and breadcrumbs
Fix comments format in responsive.css

PHPBB3-11552
[ticket/11552] Display checkbox in forums list

PHPBB3-11552
[ticket/11552] Change breadcrumbs structure

PHPBB3-11552
[ticket/11552] Keep first nav row on same line

PHPBB3-11552
[ticket/11552] Tooltips for breadcrumbs

PHPBB3-11552
[ticket/11552] More breadcrumbs adjustments

PHPBB3-11552
[ticket/11552] Responsive menu

PHPBB3-11552
[ticket/11552] Limit width of linklists

Limit width of left/right aligned link lists

PHPBB3-11552
[ticket/11552] Hide other popups when menu is toggled

PHPBB3-11552
[ticket/11552] Align text to left in right side popups

PHPBB3-11552
[ticket/11552] Insert responsive menu toggle before li.rightside

Insert responsive menu toggle before li.rightside to prevent
li.rightside:last-child css rule from not working

PHPBB3-11552
[ticket/11552] Responsive notifications list, pagination

PHPBB3-11552
[ticket/11552] Responsive CP tabs

PHPBB3-11552
[ticket/11552] Join functions for hiding tabs and menu

PHPBB3-11552