Issue #2408479 by joaogarin, LewisNyman: Rewrite breadcrumb component inline with our CSS standards

core/themes/seven/css/components/breadcrumb.css

 /**
+ * @file
  * Breadcrumbs.
  */
+
 .breadcrumb {
   font-size: 0.846em;
   line-height: 1em;
-  padding: 20px 0 10px 0;
+  padding: 20px 0 10px;
 }