Fix RPC op detection, so unrecognized requests aren't shown in the list

Author: pimterry

src/model/api/jsonrpc.ts

@@ -117,7 +117,7 @@ export class JsonRpcApiExchange implements ApiExchange {
     }
 
     matchedOperation(): boolean {
-        return !!this._rpcMethod;
+        return this._rpcMethod && !isErrorLike(this._rpcMethod);
     }
 
 }