* Display pictures for buttons on PSP in the keybinding screen.
* Fix a bug where the New Binding... button would disappear when
creating a new binding.
* Fix a bug where the menu to choose the bound symbol was not modal.
* The key bindings now display (semi-)correctly.
- Here, "semi-" means the local keys display as a string under X and
a number everywhere else. The number is all but helpful and will
have to be replaced before it is usable, but at the moment, the
code is stable afaik.