Not pickup items when modifier key is not default.

[Alchemist-VII]

If someone have another "item pickup key modifier" like me it wont pick up items from floor.
Maybe need get key modifier from game or add new setting to add same key modifier on plugin settings.

Too will be nice allowed to add "mouse buttons" to Pickup key on settings, cause i cannot add XMouseButton 01-08 instead default F1 key.