Location of SymbolInformation gets lost when range is not defined

[fvclaus]

This is a follow-up of microsoft/vscode#136618

location of SymbolInformation is lost in the deprecated vscode.SymbolInformation constructor that is used here:

vscode-languageserver-node/client/src/common/protocolConverter.ts

Lines 816 to 819 in 859a8ec

	let result = new code.SymbolInformation(
	item.name, asSymbolKind(item.kind),
	asRange(item.location.range),
	item.location.uri ? _uriConverter(item.location.uri) : uri);

This is only a problem if range is not defined in which case vscode will not display the symbol in the symbol picker. The range needs to be falsy in order to use resolveWorkspaceSymbol

To override resolveWorkspaceSymbol, I used the following code:

const feature = this.languageClient.getFeature('workspace/symbol');
const provider: WorkspaceSymbolProvider = feature.getProviders()[0];
provider.resolveWorkspaceSymbol = (symbol, token) => {
	return new SymbolInformation(symbol.name, symbol.kind, "foo", new Location(Uri.parse("/foo"), new Position(120, 20)))
}

The updated constructor invocation should create exactly the same object as before: https://github.com/microsoft/vscode/blob/042a6e36a495db9830029d87c12dd9b65c7e3b47/src/vs/workbench/api/common/extHostTypes.ts#L1094-L1110