Cell render breaks when grid is refreshed during edit in IE

[justindoherty]

In Internet Explorer the rendering of a cell will stop working correctly if the grid data is refreshed while the editor is active in dgrid version 0.3.17. A null pointer is thrown in editor.js:108 because the parent node to the editor widget is null.

Here is a fiddle showing the issue, load it in IE11 and click the button. The editor should activate on the first row and a second later the grid will refresh breaking the rendering of it. http://jsfiddle.net/jdoherty/obbdbpdp/