add a Settings/Preferences window

[jan-zajic]

add a Settings/Preferences window where you can:

• Change User data directory location
• disable the auto-update

[mb21]

Thanks, I quickly tried it and got:

electron/main.ts(341,24): error TS2304: Cannot find name 'closeWindow'.

But anyway, looking at the screenshot of electron-preferences, I'm wondering whether we want to rely on this package. I was thinking of doing something similar to, or even reusing the MetaEditor component...