Unclosed label tags cause widget drag/drop issue in IE

Some of your widgets don't drag and drop correctly in IE. The error that you get is:

Message: 'this.helper.0.style' is null or not an object
Line: 367
Char: 1983
Code: 0
URI: http://example.com/wp-admin/load-scripts.php?c=1&load=thickbox,hoverIntent,common,jquery-color,jquery-ui-core,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-droppable,admin-widgets&ver=9b8cd1c14d45ddbb0c28da8ca9e4a230

After a bunch of hassles trying to figure it out, I found that it's because you are missing a couple closing tags from labels. Here's what I changed:
* In /marketpress-includes/marketpress-ms.php I added a close label tag for the 'Content To Show:' label.
* In marketpress.php I added a closing label tag for the 'Order Products By:' label.