Unable to type in CKEditor popup fields for image, link in "Edit Box" popup

This is reproduced by the following steps for a box containing a CKEditor field using inline editing:

1. Click on the contextual "Edit Box" option for a visible block to open the box edit popup
2. Within the CKEditor instance, add a link or image
3. In the resulting CKEditor plugin popup, try to edit any text field. You can place the cursor in a field, use the mouse to paste, but cannot type anything into the field.

This is a documented bug when hosting a CKEditor instance inside of a jQuery dialog, which is what this module uses for the popups:

http://forum.jquery.com/topic/can-t-edit-fields-of-ckeditor-in-jquery-ui...
http://dev.ckeditor.com/ticket/4501

The quick and easy fix is to set the modal dialog's z-index to -1 on instantiation in boxes.js (as documented in the jQuery ticket above) vs. the convoluted and poorly documented patches provided on the jQuery site (referenced in both tickets above).