Fixed a header bug

Fixed a bug where header.row would not display properly, should now work as expected, enabling layout customization and responsiveness inside the header.

dist/mini-dark.css

@@ -1094,6 +1094,10 @@ header .logo, header a.button, header a[role="button"] {
   text-decoration: none;
 }
 
+header.row {
+  box-sizing: content-box;
+}
+
 nav {
   display: block;
   background: #37474f;