Undo responsive table for reports (#444)

It was removed on purpose in fdb041c23b.
Instead just add a CSS rule to fix the table header.

nyaa/static/css/main.css

@@ -480,6 +480,10 @@ body.dark .comment-panel:target {
 	border-color: white;
 }
 
+body.dark .table > table {
+	background-color: #323232;
+}
+
 /* trusted */
 body.dark .torrent-list > tbody > tr.success > td {
 	color: inherit;

nyaa/templates/reports.html

@@ -2,7 +2,7 @@
 {% block title %}Reports :: {{ config.SITE_NAME }}{% endblock %}
 {% block body %}
 {% from "_formhelpers.html" import render_field %}
-	<div class="table-responsive">
+	<div class="table">
 		<table class="table table-bordered table-hover table-striped table-condensed">
 			<thead>
 			<tr>