Feature request: Add extra 'screen' ability to notebook

[nasfarley88]

I make copious use of the extra 'tab' or 'screen' function when reading my scriptures, keeping more than one open at a time but recently started to try and prepare a talk on there when I found I couldn't keep the notepad open at the same time as my scriptures! It seems like the button just isn't there? I don't know if it would take a complete restructure of the code, or adding that function would be the best solution, I'd just really like to be able to keep the notepad (with my current document open) open while reading scriptures.