Apply Resonite styling to Tooltips

[Banane9]

Currently, the tooltips added by the gamepack (#60) are just black rectangles - they should get some neater styling to make them fit in with the visual language of Resonite.

[Nytra]

This has been done

[Banane9]

I'd still like to not abuse the title of the standard panel for this and have it automatically sized for the tooltip 🤔