Add hotkey for toggling minimize/restore

[spokorski]

Whenever I want to price the stuff I just got from a delve/map, I have to tab out of POE, find Xenon in the task bar, then come back to POE. It would be really nice if there was a hotkey I could use in-game to bring up xenon and being pricing things immediately.

Ideally this hotkey would toggle, but isn't required. Minimizing the app is simple since it already on-screen; the primary inconvenience is restoring it after it has been minimized.

[klayveR]

Hotkey for hiding/showing XenonTrade

[Aerinx]

Alternatively, I would like an option to minimize all cards into the bar, so you still have the app open and visible but doesn't take screen space until you need it. With the new trading feature I think this is something sorely needed, since you can not control when new cards appear on the app.