updates

assets/css/src/main.css

@@ -2697,6 +2697,11 @@ button.add {
   width: 1.5em;
   font-size: .7em;
   padding: 0;
+  opacity: 0;
+}
+
+h3:hover > button.add {
+  opacity: 1;
 }
 
 /* perfect-scrollbar v0.6.5 */

assets/css/src/sass/main.scss

@@ -249,6 +249,11 @@ button.add {
   width: 1.5em;
   font-size: .7em;
   padding: 0;
+  opacity: 0;
+}
+
+h3:hover > button.add {
+  opacity: 1;
 }
 
 @import "scrollbar";

assets/js/src/app.js

@@ -1,6 +1,12 @@
 $(document).ready(function() {
   $('.scroll').perfectScrollbar();
 
+  var n = noty({
+    layout: 'topRight',
+    type: 'success',
+    text: 'noty - a jquery notification library!'
+  });
+
   $("#preview").click(function(e) {
     e.preventDefault();