At the moment, there is an issue with the icons displayed within the AppBuilder
extension for VisualStudio
. There is no visual representation of the uploaded image for all platforms for app icons, splash screens, tile images. You can still upload new images but there is no visual indication of the status of the operation in the Project Properties
window. However, the icon changes are actually applied and running the app on a device will confirm that fact.
We are currently working on a fix, but in the meantime you can check the uploaded icons/images in the solution explorer under the App_Resources folder where the image files are contained. Also, please do accept my apology for any inconvenience this might have caused you.
As for the jQuery Mobile sample app, it is indeed no longer available as a project template and is now listed as a demo app. You can read more about the new features and updates in the latest AppBuilder release in the Release Notes. Basically, to begin hybrid app development from the jQuery Mobile sample, you will have to clone it in your preferred AppBuilder client - it is part of the Advanced APIs samples.
Let me know if I can further assist you.