No Appbar in window

[Mohanswami]

For the windows, there is a check in the code, which does the following:

• if both the appbartitle and the BarcodeAppBar are null, there will be no app bar generated

The problem

• no barcode app bar is passed to the WindowBarcodeScanner class in BarcodeScanner class, where the Platform check is happening. So even if a BarcodeAppBar is provided in SimpleBarcodeScanner.scanBarcode() function, it will not be passed on to WindowBarcodeScanner and
• there is no option to provide the appbartitle in the SimpleBarcodeScanner.scanBarcode() function.

Since there is no appbartitle and the BarcodeAppBar is not passed, the WindowBarcodeScanner create a widget without an Appbar