Scrolling up affects only the top line of the screen

[mphaney]

With commands like less and man, scrolling down using the arrow keys works precisely as one might expect, however scrolling up appears to only affect the top line of text on the screen. Scrolling down again after having tried to scroll up, simply resumes the downward scroll as though the attempt to scroll up never occurred.

A similar phenomenon is observed when searching for text using /, or navigating using other shortcuts such as PgUp/PgDn or g/G

This is possibly related to #34 but that one is very difficult to read and understand.

[zadjii-msft]

This is a dupe of #27, and the fix should be on the way.

[bitcrazed]

Closing as a dupe of #27