Add index for invoices.{customer,company}_id.
Add index for invoices.{customer,company}_id.

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