Add-ons cleanup

[vcardillo]

cc @JosephLauSF

• Your grid spacing is slightly off. There is less space between the main dish and the others, for the build bento screen.
• The addons are not denoted separately in menu preview (pic below). They need to have their own section called "Add-ons", and they span full width. Like iOS.
• $3.50 is showing as $3.5 in summary screen (pic below)

[gatgithub]

Verified - Implemented - 02.12.2016