Use bootstrap accordions, cards and set colors in statistics page.

DiscImageChef.Server/styles/dicserver.scss

@@ -31,4 +31,25 @@ header a:hover
 footer a:hover
 {
     text-decoration: none;
+}
+
+.table-centered
+{
+    margin-left:auto;
+    margin-right:auto;
+}
+
+.card-button{color:$yellow}
+
+.table-dark-em
+{
+    color: $brown;
+    font-style: normal;
+}
+
+.table-dark-header
+{
+    color: $brown;
+    font-style: normal;
+    text-align: center;
 }