Spurious warnings from server

[JonatanWaern]

The DLS, seemingly, sends spurious warnings about missing semantic/syntactic analysises to the client during regular browsing. These messages are supposed to only be sent in response to a goto-def/ref/decl/impl/etc. or other request that requires information.

No reliable reproducer at the moment.

[JonatanWaern]

After some initial examination, vscode does seem to send requests at least at times without the user directly asking for it. So we would need a way to distinguish those sorts of requests from these directly initiated by a goto request.