initial attempt at porting new upsell stuff from sb3
coder cleanup
combined two unconditionally included files into the main module file
lots of refactoring of the upsell module file
cleanup
fixed some comments
Adjusted the form_alter logic in upsell
bugfix for modal dimensions
replaced mailtron function call
fixed some test mail issues
removed decouple options and switching since decoupled is the only mode for upsell
Updated blockUI to the latest version and added jquery_update as a dependency
modal shows up
Bringing css and js up to date from sb3
Changed modal to be themable
removed inline styles
add the css file to the admin page
added comments
moved some form keys around
css edits