Highlight recently modified tasks on board (pull-request #201)

assets/css/app.css

@@ -584,6 +584,10 @@ a.filter-on {
     font-size: 95%;
 }
 
+.task-board-recent {
+    box-shadow: 0px 0px 10px rgba(82, 158, 236, 1);
+}
+
 .task-table a,
 .task-board a {
     color: #000;

assets/js/app.js

@@ -77,8 +77,7 @@ Kanboard.Board = (function() {
             connectWith: ".column",
             placeholder: "draggable-placeholder",
             stop: function(event, ui) {
-                var task_id = parseInt(ui.item[0].getAttribute("data-task-id"));
-                board_save(task_id);
+                board_save(ui.item.attr('data-task-id'));
             }
         });