Fix for removing sDashboard widgets in IE

Installed sDashboard today and was testing my app in IE9 when I noticed that removing a widget was broken.

The offending line can be seen in the diff below - apparently IE does not support the HTML element remove() function. I am not very familiar with either Git or sDashboard, but I believe this fix should do the job.

Have briefly tested the changes in Chrome, Firefox and IE9 on Windows 7. Seems to work OK.