truncated breadcrumbs for mobile

less/header.less

@@ -213,6 +213,20 @@
 	font-size: 16px;
 	padding: 0;
 	background: none;
+
+	@media (max-width: @screen-sm-max) {
+		li {
+			display: none;
+		}
+
+		li:nth-last-child(2), li:nth-last-child(1), li:last-child {
+			display: inline-block;
+		}
+
+		li:nth-last-child(2):before {
+			display: none;
+		}
+	}
 }
 
 #reconnect {