Invoices - Bulk Email
On Invoices, put in an option to Exclude from Bulk Email

When Emailing bulk email, anything with Exclude from Bulk email is excluded from email

Company email
If the company email is blank and the send to Invoiced contact tick is OFF, skip invoice emailing and move to next to email.
If the company email is blank and the send to Invoiced contact tick is ON, use the contact person email to send email (like it is now).
