New feature: print batch of invoices / statements

You can now print off a batch of invoices all at once, rather than having to open each booking one at a time. You'll find a new 'Invoices' option under Reports:

Then you can select a particular date range (based on either arrival date or departure date), and limit the report to just some rooms (if required):

Clicking 'Show' will open a PDF in a new tab, with one page for each invoice.