Add another keyboard command for "help", to avoid F1 being captured by terminal emulator

[flyte]

Please could you add another command for 'help', as well as F1? This is because F1 is captured by my terminal emulator and opens its help instead.

I initially tried pressing ? first, so maybe that would be a good choice.

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Version: 0.5.0
Installation method: binary

[flyte]

I see that you can change the key bindings in the config, my mistake! For anybody reading this, you have to include all of the default key bindings too, not just the ones you want to change. Otherwise you'll get stuck in the program with no working keys!