fix web interface showing very small when accessed on smartphone

core/templates/layout.base.php

@@ -11,6 +11,7 @@
 		<?php p($theme->getTitle()); ?>
 		</title>
 		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+		<meta name="viewport" content="width=device-width; initial-scale=1.0;">
 		<link rel="shortcut icon" href="<?php print_unescaped(image_path('', 'favicon.png')); ?>" />
 		<link rel="apple-touch-icon-precomposed" href="<?php print_unescaped(image_path('', 'favicon-touch.png')); ?>" />
 		<?php foreach ($_['cssfiles'] as $cssfile): ?>

core/templates/layout.guest.php

@@ -11,6 +11,7 @@
 		<?php p($theme->getTitle()); ?>
 		</title>
 		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+		<meta name="viewport" content="width=device-width; initial-scale=1.0;">
 		<meta name="apple-itunes-app" content="app-id=543672169">
 		<link rel="shortcut icon" href="<?php print_unescaped(image_path('', 'favicon.png')); ?>" />
 		<link rel="apple-touch-icon-precomposed" href="<?php print_unescaped(image_path('', 'favicon-touch.png')); ?>" />

core/templates/layout.user.php

@@ -14,6 +14,7 @@
 		</title>
 		<meta charset="utf-8">
 		<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
+		<meta name="viewport" content="width=device-width; initial-scale=1.0;">
 		<meta name="apple-itunes-app" content="app-id=543672169">
 		<link rel="shortcut icon" href="<?php print_unescaped(image_path('', 'favicon.png')); ?>" />
 		<link rel="apple-touch-icon-precomposed" href="<?php print_unescaped(image_path('', 'favicon-touch.png')); ?>" />