--cleanup.
refactoring: rename match3.core.controllers.AbstractPanelController -> match3.core.controllers.PanelController.
refactoring: rename match3.core.display.ScreenView -> match3.core.display.ScreenViewContainer.
refactoring: rename match3.core.display.BaseScreen -> match3.core.display.ScreenView.
--minor.
create SettingsPanel.
implement method getViewType
cleanup.
small refactor.
add method reset
add method reset.