Show hotkeys on trade requests

[Pegoth]

I never remember the hotkeys for sold/still need etc. It would be really nice to have the option to show all hotkeys when hovering over a trade request, so I know what to press for what (so I don't have to alt tab and check the https://github.com/C1rdec/Poe-Lurker/blob/master/assets/CheatSheet.md)