reset method
Resets configuration to default configuration which has been provided
while initializing MaterialApp.
If setTheme method has been called with isDefault to true, Calling
this method afterwards will use theme provided by setTheme as default
themes.
Implementations of this method should end with a call to the inherited
method, as in super.reset()
.
Implementation
@mustCallSuper
Future<bool> reset() async {
_preferences.reset();
updateState();
modeChangeNotifier.value = mode;
return _preferences.save();
}