* Add the confirmation screen for bindings.
- Add support for asking confirmations before exiting the menu.
- Add support for cancelling saving of options.
- Add support for requesting focus when the parent allows to yield.
* Recenter most options' text.
* Change the background color of the selected options (else, there is
no way of knowing where is the cursor when both option text and
option value are icons).
* Change symbol names to their equivalent PSP icon use in wagic.
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