Fixed multipying downloads on login/logout

Added failed message on logon

FoxTube/Assets/Data/Patchnotes.xml

@@ -1,5 +1,13 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <items>
+  <item time="2019-06-19" version="1.0.1">
+    <content>
+      <en-US>### What's new:
+- Improved analytics tools for more precise bugs tracking
+- Fixed multipying downloads history entries on login/logout
+      </en-US>
+    </content>
+  </item>
   <item time="2019-05-21" version="1.0">
     <content>
       <en-US>##[Final release]

FoxTube/Classes/DownloadAgent.cs

@@ -20,6 +20,7 @@ namespace FoxTube
         public static async void Initialize()
         {
             Downloads = await KnownFolders.VideosLibrary.CreateFolderAsync("FoxTube", CreationCollisionOption.OpenIfExists);
+            Items.Clear();
             try
             {
                 List<DownloadItemContainer> containers = JsonConvert.DeserializeObject<List<DownloadItemContainer>>((string)settings.Values[$"downloads"]);

FoxTube/Classes/SecretsVault.cs

@@ -149,12 +149,15 @@ namespace FoxTube
                 if (e.Message.Contains("UserCancel"))
                     return;
                 else
+                {
+                    AuthorizationStateChanged?.Invoke(args: new bool?[] { null });
                     Analytics.TrackEvent("Failed to authorize", new Dictionary<string, string>
                     {
                         { "Exception", e.GetType().ToString() },
                         { "Message", e.Message },
                         { "StackTrace", e.StackTrace }
                     });
+                }
             }
 
             if (Credential == null || !retrieveSubs)

FoxTube/Pages/Downloads.xaml.cs

@@ -30,6 +30,7 @@ namespace FoxTube.Pages
         protected override void OnNavigatedFrom(NavigationEventArgs e)
         {
             base.OnNavigatedFrom(e);
+            list.Children.Clear();
             DownloadAgent.Page = null;
         }