Add setting to preserve leading zeros

[ssayre]

A setting to preserve leading zeros is essential when working with CSV files. I work with account numbers which often include leading zeros and are are not a fixed length. As such, any work-arounds to pad leading zeros to a fixed length value do not work. Rather, I prefer if the application did not corrupt data upon opening a file in an attempt to be "helpful". A global setting to preserve leading zeros, which would allow files to be opened from the file manager without corruption would be fantastic.