Issue #290: cleanup unused code in SelectionManager
Issue #290: cleanup unused code in SelectionManager

GMartigny/piskel,GMartigny/piskel,juliandescottes/piskel,GMartigny/piskel,juliandescottes/piskel,smiegrin/piskel,piskelapp/piskel,piskelapp/piskel,smiegrin/piskel,piskelapp/piskel,smiegrin/piskel,zoeesilcock/piskel,juliandescottes/piskel,zoeesilcock/piskel,zoeesilcock/piskel