make PDF statement only display contribution range when range is available
make PDF statement only display contribution range when range is available

if this is the 1st payment in the payment history, do not display statement date range, per @nejczdovc / @mrose17 suggestion

fixes #6897

diasdavid/browser-laptop,timborden/browser-laptop,timborden/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop,timborden/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,luixxiul/browser-laptop