Subclassing from Manager, please make it protected.

[cirdog]

Hi,

I noticed the config('langmanGUI.route_group_config.namespace') actually allows us to switch to our own Controller extending from the base Controller, but some private methods & attributes are prohibiting me from doing so.

private $disk;
private function getTranslationsFromFiles()
private function backup()

Please kindly make these 'protected', thanks very much.

[JapSeyz]

@cirdog Can you make a PR? it makes it a lot easier for Themsaid