difficultenhancementhelp wanted
Description
Well, imagine you have a binding like "Q", and "q" - both of them are fired by hitting "Q" key on your keyboard.
But if you somehow display these keys on the screen of your app - users type shift+q to match the uppercase "Q", and just q for lowercase "q".
Hence, it would be nice if jwerty could detect shift+key, if bound key IS IN uppercase.