6.x 3.3 upsell2

Lots of tweaks and fixes:
- requirements check for lightbox2 or thickbox
- disable the sustainer_upsell section of the node edit form if there is a custom redirect on the confirmation
- css class option for opening up easier modal theming per node
- optional modal window resizing options per node
- fixed template bug preventing theme level template overrides
- run through coder tough love before submitting