Remove tippyjs from MenuBar and Action Center

[PuruVJ]

Currently, MenuBar, to show menus, uses TippyJS and lots of state management with Jotai. But that is quite slow.

Goal:
Remove TippyJS from the equation entirely.
Rely on CSS as much as possible, though using Jotai to show stuff actually seems like the best scenario here, as :hover will not work unidirectionally, that is, it will show as well as hide on hover and removed-hover, which we do not want.

Same goes for ActionCenter. Use same methods for it too

[Aslemammad]

I'm going to work on this issue, thanks.

[PuruVJ]

The files to look at: MenuBar.tsx and Menu.tsx, both in TopBar folder