Add option to only show subtotal on final page

[TwistedTwigleg]

I've recently started using Upcount and I'm really liking how quick and easy it makes generating invoices to my clients! It also is working great on Linux, which is a huge plus.

There is one thing though that I think is a bit confusing: The total/subtotal box is shown on each page that contains invoice items, rather than only being shown on the final page of the invoice. This can a be a little distracting when going down the items in the invoice linearly, and can also cause confusion as to where the end of the list is (which is the main issue in my opinion). If possible, could an option be added to toggle adding the total/subtotal on only the last page of the invoice? (I can look at adding the feature myself, though my Javascript is a little rusty and I have extremely limited knowledge of React)