Minor Fix to Cleanup Console

[mdashti]

If you use dragsort with Tagify and then you double click on a tag to modify it and then drag the tag in edit mode, you'll see the following error in console:

Uncaught TypeError: t.closest is not a function
    getDraggableElm file:///chart/assets/js/dragsort.js:1
    dragenter file:///chart/assets/js/dragsort.js:1
    dragenter file:///chart/assets/js/dragsort.js:1
    bindEvents file:///chart/assets/js/dragsort.js:1
    n file:///chart/assets/js/dragsort.js:1
    DragSort file:///chart/assets/js/dragsort.js:1
    <anonymous> file:///chart/index.html#branches[]=master:701
    onload file:///chart/index.html#branches[]=master:1089
    getGZipJSON file:///chart/index.html#branches[]=master:1079
    <anonymous> file:///chart/index.html#branches[]=master:681
    onload file:///chart/index.html#branches[]=master:1089
    getGZipJSON file:///chart/index.html#branches[]=master:1079
    <anonymous> file:///chart/index.html#branches[]=master:622
    jQuery 13
dragsort.js:1:879

This fix prevents unnecessary errors in the console.

[yairEO]

Thanks, good catch, I will change a bit and push the fix