Bug: nflow explorer requests missing content-type since msal feature added

[RealZimboGuy]

the fetch requests were changed to use the authenticated call in the service.ts, when msal is not enabled the requests are missing the additional options "content-type": "application/json"

this results in any PUT / POST requests to the api failing with 415 Unsupported Media Type

the specific changes

the below is the code path when msal is not enabled there is no content type set