checkboxes lose state if action requires a confirmation screen and user cancels or uses back button

This is a bit of a usability problem that affects all of the checkboxes where bulk selection is available.

1. Visit admin/content/node
2. Check off several boxes
3. Select "Delete" operation and click Update
4. Use the backbutton or cancel link

Expected results:
The previously selected checkboxes are still selected.

Actual results:
No checkboxes are selected.

One interesting note about this bug is that it goes away of Javascript is disabled in the browser. So, my guess is that the fix for this will be in the multi-select js code.