Amendments on Roll marking screen

1. In v 8.0.71 and above a number now displays for Ensembles in the Billed lessons column (This was previously blank, the column only showed No. Lessons RP for Tuition records.) 
It reads this number from the 'Number of Sessions' in the Ensembles/Classes file.

2. In v 8.0.71 and above the 'Print Rolls' script (the one that runs when clicking the printer icon on the roll-marking screen) has been modifed.
​It now displays the toolbar at the top of the preview screen and it PAUSES before bringing up the print dialog box. So now it's possible to:- scroll through the pages and check before printing;
- choose to NOT print particular pages; - save/email selected pages as pdf.