Feature - tooltip: opacity fade away transition

[miki-saarna]

Noticed tooltip applies smooth opacity when fading in on hover, but when hovered off, tooltip instantly disappears without transition period.

Screen.Recording.2024-03-29.at.1.52.51.PM.mov

[miki-saarna]

Note: I went ahead and forked/cloned a copy of the web3uiKit repo and tested/experimented with a working solution. I'm happy to create a PR with the potential solution if requested.