[BUG] PX file with multiple lines for values won't load if any of the lines don't have a space at the end

[neilfromcork]

PX file with multiple lines for values won't load if any of the lines don't have a space at the end.

The Px parser is expecting \r\n, however this should be amended to only take \n as the HtmlSanitizer will change \r\n to \n. Also, this change allows px files that have been created in a Unix environment.

[neilfromcork]

Fixed in DEV - ready for test