[TIMOB-16672] Windows Hybrid: Downloading a file while offline crashes the app

   tiwp8.downloadFile({
   	url: 'http://www.ambientreality.com/test.pdf',
   	//saveTo: 'foo.pdf', // tmpFolder.Name,
   	overwrite: true,
   	oncomplete: function (e) {
   		var ea = e.eventArgs,
   			file = ea.property('file'),
   			size = ea.property('size');
   
   		console.log('Finished downloading file to ' + file);
   		console.log('File is ' + size + ' bytes');
   
   		var currentFolder = tiwp8.staticProperty('Windows.Storage.ApplicationData', 'Current'),
   			localFolder = currentFolder.property('LocalFolder');
   
   		// convert the full path to a relative path
   		file = file.replace(localFolder.property('Path') + '\\', '');
   
   		localFolder.invokeAsync('GetFileAsync', ['System.String', file], function (pdfFile) {
   			tiwp8.invokeStaticAsync('Windows.System.Launcher', 'LaunchFileAsync', ['Windows.Storage.IStorageFile', pdfFile], function (success) {
   				console.log('LaunchFileAsync success?', success);
   				currentFolder.destroy();
   				localFolder.destroy();
   				pdfFile.destroy();
   			});
   		});
   	},
   	onerror: function (ex) {
   		alert(ex);
   	}
   });