Show official URL on item detail page

src/scss/tags.scss

@@ -24,6 +24,11 @@ button {
         background: white;
         color: $color-active-hover;
     }
+
+    &.large {
+        margin: 2em 0;
+        padding: 0.5em 0.5em;
+    }
 }
 
 h1 {

src/scss/templates/item_page.scss

@@ -13,6 +13,16 @@ All rights reserved.
         display: inline-block;
     }
 
+    .sidebar {
+        .externalLink {
+            display: none;
+        }
+
+        button.large {
+            width: 100%;
+        }
+    }
+
     .mainBody {
         h1.name {
             font-family: $font-family-header;