Collated and Single Invoicing change

The Single and Collated Invoicing features previously allowed a user to go through the steps of completing the invoicing process even when no jobs needed to be invoiced.  This has now been prevented.

Subject lines of invoice emails

A request was received for the Subject lines of the invoice emails that ScribeManager sends to be changed, because when they contain the word "Invoice" they are sometimes blocked by spam filters.  This has been complied with.  The new email Subject is: "Total of Transcription Services Provided".