[Bug 47743] Witcher Script Merger doesn't work on 4.15

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47743

--- Comment #4 from Andrew Eikum  ---
(In reply to Andrew Eikum from comment #3)
> Likely we need to implement support here:
>
> 002d:fixme:mscoree:ConfigFileHandler_startElement Unknown element
> L"appSettings" in state 2
> 002d:fixme:mscoree:ConfigFileHandler_startElement Unknown element L"add" in
> state 6

This is unrelated. Seems to be a problem in Mono's System.Configuration failing
to save all of these variables when it rewrites the config file on exit.