fix #3030

To make a valid link show up on orders when multiple parameters are set (trackingnumber and postcode).
Merge branch 'msigley/meta-load-hook' into 1.3.x
Merge branch 'JM-fix-#3030' of https://github.com/Just-m/shopp into Just-m-JM-fix-#3030
Merge branch 'Just-m-JM-fix-#3030'