Renaming method for consistency
Fix wrong log class
Making constant that points to settings file public
Adding class for saving settings
Using functionality from saver class to save instead of inline logic.
Moving settings argument to constructor instead
Adding interface for settings saver
Sending settings saver to controller
Adding test of controller changeMyNick
Adding public method in controller for saving settings
Using settings saver when changing nick
Adding method to save settings in mediator
Using mediator to save settings in settings dialog
Removing method to save settings from settings