Show warning message in WebJobs Dashboard regarding webjobs 3.x

[paulbatum]

The WebJobs dashboard cannot be used for webjobs 3.x onwards. The dashboard needs to display a relevant warning message and link to appropriate documentation regarding Application Insights.

[paulbatum]

The page should probably be linking to one of these (not sure what is is most complete or up to date)

• https://github.com/Azure/azure-webjobs-sdk/wiki/Application-Insights-Integration#webjobs-version-3x
• https://docs.microsoft.com/en-us/azure/app-service/webjobs-sdk-get-started#add-application-insights-logging

[brettsam]

I agree that a message here would go a long way.

@paulbatum -- I'm guessing this falls in the supportability bucket? @fabiocav as FYI -- we may need someone to ramp up on the Dashboard code so we can get this added.

[paulbatum]

Yes, thanks for adding the tag.