* Hide 'Status Code:' field for interrupted requests that don't have it.
* Clear up previously selected body when showing aborted requests.
* Highlight interrupted requests in red.
Pulled out from https://github.com/microsoft/playwright/pull/31900
I stumbled over `React.Children`, because it's the first time I saw that
used. https://react.dev/reference/react/Children lists `React.Children`
it as "Legacy" and mentions it's uncommon. Also, the fact that SplitView
only displays its first two children, and all others are silently
discarded, can be a surprise to some.
By separating things out into `sidebar` and `main`, not only do we give
the two elements names (otherwise one needs to remember that sidebar is
always the first child), but we also prevent any "third children" from
being dropped.
* Column widths are now stored on in the NetworkPanel context, this way
they are not reset after selecting an empty range (and changing position
of the NetworkGridView in the component tree).
* Column widths values are now preserved if column set changes (e.g.
selecting entries from a single context and then from multiple
contexts).
