Settings: "Edit in Settings" link should be more helpful

[bpasero]

Refs: #50496

When clicking on the "Edit in Settings" link we should at least highlight the setting in the classic editor to be useful. Now I have to search the setting again in the old editor.

I think a better experience would be to show an embedded editor in the new settings editor and allow to type there, similar to the playground where we show small editors for typing.

[roblourens]

Now it does show just the matching setting in the json editor.