Actually "fix wrong icons shown in the path bar"

Rel: #654

assets/stylesheets/global/_icons.scss

@@ -17,7 +17,7 @@
 }
 
 %doc-icon-2 {
-  background-image: image-url('docs-2.png');
+  background-image: image-url('docs-2.png') !important;
 }
 
 @media (-webkit-min-device-pixel-ratio: 1.5), (min-resolution: 144dpi) {