add support for different currencies in bookings _form
add support for different currencies in bookings _form

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