c99dfd8f63 only meant to be able to switch to the test mode of
QStandardPaths, not to move the default dir on OS X, iOS, BB10 and Android.
So this commit restores it to the previous behavior, to avoid migration issues.
The use of XDG_CONFIG_HOME, defaulting to ~/.config, on OS X, is even documented
in the current QSettings documentation, even though these paths are non-standard
on OS X (granted, the use of ini-style config files isn't either).
Task-number: QTBUG-41461
Change-Id: I5eb610ff7ccbdaf6f955ef7f8f7c2658cbecbb86
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
955c9562bd