allow changing keybinds for the first and last item in the editor

[pxxu]

I have accidentally pressed key v, uparrow and downarrow in the editor many times, as they are close to key c, space, leftarrow and rightarrow, and accidental pressing resulted in jumping to a distant point in the timeline. Then i have to scroll through the timeline to find the point i was working on, and this happens frequently for me. I'd like an option to change keybinds for 'Jump to last note' and 'Skip between timing points'.