[ticket/11921] Improve appearance of Notifications in linklist

PHPBB3-11921
[ticket/11921] Improve appearance of PM notifications in linklist

PHPBB3-11921
[ticket/11921] Remove "l_" from non-lang variables

PHPBB3-11921
[ticket/11921] Move any HTML for Notifications to the templates
PHPBB3-11921
[ticket/11921] Only get the count of unread PMs
PHPBB3-11921
[ticket/11921] Directly inject unread messages count into the template

PHPBB3-11921
Merge pull request #1781 from VSEphpbb/ticket/11921

Ticket/11921 - Streamline PMs and Notifications in Header Link List
[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