added btn class

src/client/styles/scss/_user.scss

@@ -46,8 +46,8 @@
     }
   }
 
-  .btn-like,
-  .btn-bookmark {
+  .btn.btn-like,
+  .btn.btn-bookmark {
     &.btn-lg {
       padding: 8px;
       font-size: 1.5em;