[VFP] SET MEMOWIDTH not implemented

[cpyrgas]

1. SET MEMOWIDTH TO command is not implemented

2. SET("MEMOWIDTH") does work and has a default value of 50, but this is nowhere used.

According to https://hackfox.github.io/section4/s4g094.html, several functions like ATCLINE(), ATLINE(), RATLINE(), MEMLINES(), MLINE() etc make use of this setting. The default implementation for those functions in the X# runtime are VO-compatible, using a standard length of 254 chars for line breaks, most probably we need to make this optional and apply the MEMOWIDTH setting for teh VFP dialect.

[RobertvanderHulst]

The functions now all use the value from Set.SetMemoWidth, which is exposed as RuntimeState.MemoWidth.
The default value for this is now set to 79 (like the hardcoded value from VO) and this value is set to 50 in the initialization code inside XSharp.VFP

[cpyrgas]

SET MEMOWIDTH TO does not work properly, because there's a typo in its definition:

#command SET MEMOWIDTH TO => Set(Set.MemoWidth, <(x))

When using SET("MEMOWIDTH") it does work as expected now!