Localization fixed. Player fixes. Menu fixes

Related Work Items: #243, #245

FoxTube/Controls/VideoPlayer.xaml.cs

@@ -294,6 +294,7 @@ namespace FoxTube
                 {
                     seek.Value = controller.Position.TotalMilliseconds;
                     seekIndicator.Value = seek.Value;
+                    bufferingLevel.Value = videoPlayer.PlaybackSession.DownloadProgress * 100;
                 });
             }
             catch { }
@@ -777,11 +778,6 @@ namespace FoxTube
             LoadTrack();
         }
 
-        private void videoSource_BufferingProgressChanged(object sender, RoutedEventArgs e)
-        {
-            bufferingLevel.Value = videoPlayer.PlaybackSession.DownloadProgress * 100;
-        }
-
         private void GotoLive_Click(object sender, RoutedEventArgs e) //TODO: Refactor
         {
             try

FoxTube/Pages/MainPage.xaml.cs

@@ -220,6 +220,9 @@ namespace FoxTube
             }
             else if (e[0] as bool? == false)
             {
+                for (int k = nav.MenuItems.Count - 1; k > 8; k--)
+                    nav.MenuItems.RemoveAt(k);
+
                 account.Visibility = Visibility.Visible;
                 avatar.Visibility = Visibility.Collapsed;
 
@@ -232,8 +235,6 @@ namespace FoxTube
                 subsHeader.Visibility = Visibility.Collapsed;
 
                 subsHeader.Visibility = Visibility.Collapsed;
-                for(int k = 9; k < nav.MenuItems.Count; k++)
-                    nav.MenuItems.RemoveAt(k);
             }
             else
             {

FoxTube/Strings/en-US/Main.resw

@@ -180,7 +180,7 @@
   <data name="signEx.Text" xml:space="preserve">
     <value>Sign in with existing account</value>
   </data>
-  <data name="signIn.Content" xml:space="preserve">
+  <data name="signIn.Text" xml:space="preserve">
     <value>Add account</value>
   </data>
   <data name="signNew.Text" xml:space="preserve">

FoxTube/Strings/ru-RU/Main.resw

@@ -180,7 +180,7 @@
   <data name="signEx.Text" xml:space="preserve">
     <value>Войти с помощью существующего аккаунта Google</value>
   </data>
-  <data name="signIn.Content" xml:space="preserve">
+  <data name="signIn.Text" xml:space="preserve">
     <value>Войти в аккаунт</value>
   </data>
   <data name="signNew.Text" xml:space="preserve">