BACKENDS: Win64 - Conf parameter still creates files in %appdata%

[lwcorp]

Using --config="conf\scummvm.ini" means I get to use a portable version for an INI file under ScummVM's own folder.

But using it still creates %appdata%\ScummVM.
Under it are Logs and Saved games.
The former contains scummvm.log and the latter is empty, probably because the portable scummvm.ini contains alternative locations for extrapath and savepath.

[digitall]

This is for usage of ScummVM as a portable application, so it needs to not create files outside of it's own installation folder:
​https://en.wikipedia.org/wiki/Portable_application

This is mainly for Win32 when running off a USB stick, but ensuring this kind of operation is useful for debugging / development even on other operating systems.

[lwcorp]

Actually it's true for Win64 too (which so far only exists as a daily build).
It's a bit ironic that the forbidden scummvm.log documents "Using configuration file: conf\scummvm.ini" which could have been an indicator that there's a folder clash.

I wonder if what this ticket describes is part of what stopped ​the ScummvVM PortableApps version.