And make it saner by not having one global password that has to be set before encrypting/decrypting, which is as racy and poorly designed as it gets
Fixes#1917 's immediate symtoms, which some potential for other regressions due to the mess that is encrypted persistence currently
After loading SettingsSerializer would keep the last group/array as current, so setting new values before the next beginGroup/beginWriteArray would be added to this group/array wrongly
This has zero inpact on qTox since we don't load before saving
We now use a binary serialized format to save space and allow clean encryption of the user settings.
All the settings can (and should) be edited from the GUI so there is no loss of functionnality.
It can still read the old .ini format, and will seamlessly upgrade to the new format.
Fixes#1810
