Fixes Weapon Attachments and other misc stuff.

[Randolio]

Repushing weapon attachment fix that was originally pushed by Scully. Tested and working. Credit to him. Removed an accidental "Lang" I Implemented to do with snowballs on client side. Removed deprecated, exploitable client event that was being used to give snowballs, replaced with secure event. Added in a new event from qb-inventory both client and server side. (Used to close the inventory) Updated NUI callbacks. Added missing itemInfo variable.

https://streamable.com/tcvjxg

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• [x] Have you followed the guidelines in our contributing document and Code of Conduct?
• [x] Have you checked to ensure there aren't other open for the same update/change?
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