Restore Keyboard-based menu navigation proposal implementation by josephbleau
Allow character manipulating with keyboard. Enter/Exit/Defaults for Configuration menu.
Finish Config menu (except Sliders and ListBoxes)
Fix navigation order
Fix ListBoxes and add Slider value change.
Complete Slider support
Fix warnings and add Permadeath checkBox
Fix ordering
Merge pull request #589 from igorko/keyboard_input

Initial implementation of keyboard-based menu navigation system