Paginator that uses all available screen/window width

make App.open_for_* look more like io.open

Now missing files will result in similar behavior: nil file handles.

Created by  Kartik K. Agaram  on August 23, 2022
NR43TWCNAUSV6MCAIGEGUTVCW32D37HCLQYPSVCJ6AVB7FOF255AC
Change contents