subGrid code cannot handle complex IDs

[unle70]

Hi Tony,

In subgrid.js, line 229, you have the following code:
$r = $("#" + pID + "_" + _id + "_expandedContent");

I think both "pID" and "_id" need: "$.escapeSelector()" before merging them into the jQuery selector.
I'm seeing errors on this when my row IDs have non-standard characters.

[tonytomov]

Thanks. Fixed.