Update .css to make the design consistent

[jonezkti]

Updated the design of itembox on item use and when showing required items to use the same design as the slots in the inventory.

Required before: Required after:

Using item before: (Same box appears when an item is removed) Using item after:

Questions (please complete the following information):

• Have you personally loaded this code into an updated qbcore project and checked all it's functionality? Yes
• Does your code fit the style guidelines? Yes
• Does your PR fit the contribution guidelines? Yes

[xchopin]

I have tried your PR it breaks the inventory by not being able to choose quantities. I fixed it by adding back the display: none (cf my comment)

[jonezkti]

Good catch, thanks for noticing the mistake. Fixed it, everything should now be working correctly.

[github-actions[bot]]

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