Add model to t_attr calls in invoice list as it gets included by customer view.
Add model to t_attr calls in invoice list as it gets included by customer view.

huerlisi/bookyt,silvermind/bookyt,xuewenfei/bookyt,xuewenfei/bookyt,wtag/bookyt,silvermind/bookyt,hauledev/bookyt,gaapt/bookyt,hauledev/bookyt,wtag/bookyt,gaapt/bookyt,gaapt/bookyt,hauledev/bookyt,gaapt/bookyt,hauledev/bookyt,huerlisi/bookyt,silvermind/bookyt,silvermind/bookyt,xuewenfei/bookyt,huerlisi/bookyt,wtag/bookyt