Add Controller Documetation in App

[jkolecr]

I have a GC ultimate and I am very forgetful so when I change between my switch and my PC I have to lookup the key combos for each on the webpage. It would be nice if it was already in the app and not greyed out when the controller is not plugged in for quick reference.

Love all the good work that has been done! I really enjoy the controller and app!

[mitchellcairns]

Thank you for the feedback, I'll consider this ^^