Add prefereduilang option to the F# compiler options page

[cartermp]

ref: dotnet/fsharp#4243 (comment)

@KevinRansom said:

use: fsc --preferreduilang:us-EN

in projects add $(OtherFlags);--preferreduilang:us-EN

There is a bug, it doesn't seem to set it for FSI, and that needs to be fixed.

fsc.exe" --preferreduilang:de-DE
Microsoft (R) F# Compiler version 10.1.0 for F# 4.1
Copyright (c) Microsoft Corporation. Alle Rechte vorbehalten.

error FS0207: Keine Eingaben angegeben.

fsc.exe" --preferreduilang:us-EN
Microsoft (R) F# Compiler version 10.1.0 for F# 4.1
Copyright (c) Microsoft Corporation. All Rights Reserved.

error FS0207: No inputs specified

This should be a fairly simple addition to the table.