fix duration

frontend/web/js/common.js

@@ -15,7 +15,7 @@ $(document).ready(function() {
 		},
 		zoom: {
 			enabled: true,
-			duration: 300 // don't foget to change the duration also in CSS
+			duration: 500 // don't foget to change the duration also in CSS
 		}
 	});