* Refactor `Tooltip` into function component with hooks
With using hooks, we don't need to maintain the checking in sCU and also
don't need to assign the value of `ref` manually.
* Show block number beside the tooltip instead of its children
* Upgrade TS from 2.9.2 to 4.4.2
* Avoid mutating a readonly array
`list` is a readonly array but `sort` will mutate the array in-place.
In newer version of TS, it can catch this unexpected behavior.
To avoid mutating a readonly array, we can sort with a new array with
either `[...list]` or `list.slice()`.
* Fix arguments of `window.location.reload`
The `reload` function type definition in `lib.dom.d.ts` takes 0
arguments now. So, we cannot pass a boolean to it.
Also, based on the documentation on MDN, Firefox is the only browser who
supports passing a `forceForget` boolean to `reload` function.
So, I wonder it should be fine to remove the boolean argument and align
the behavior to other browsers.
Ref: https://developer.mozilla.org/en-US/docs/Web/API/Location/reload
cybai