Minor INI importer problems
Fixed by !4519 (merged), but we need an issue number to put on the changelog.
- Handle
openmw.cfga bit more like the engine does. In particular, don't assume#is always the start of a comment as it's permissible in setting values, too, and has been since my second ever PR back in 2016. - Don't leave
encoding=...out of theopenmw.cfgwe write when we know what the encoding is as we've just used it to decode the INI we're importing. - Use the encoding from the existing
openmw.cfgif we've not been told to do something else.