KeyboardShortcuts.swift

// Keyboard shortcuts
    override func keyDown(theEvent: NSEvent) {
        interpretKeyEvents([theEvent])
    }
    
    override func deleteBackward(sender: AnyObject?) {
        let selectedRow: Int = self.tableView.selectedRow
        if selectedRow == -1 {
            return
        }
        
        DataManager.sharedInstance.removeTodoItem(DataManager.sharedInstance.storedTodos[selectedRow])
    }