euscanwww: Favourite/Unfavourite template code refactored

* Now is more DRY, the JS code and the HTML code are in one place
* It works even without JS

Signed-off-by: volpino <fox91@anche.no>

euscanwww/htdocs/css/style.css

@@ -238,3 +238,7 @@ textarea {
 .inline {
     display: inline;
 }
+
+.padding-bottom10 {
+    padding-bottom: 10px;
+}