Only register Window.Current.Activated once

Author: Trolldemorted

Signal-Windows/Controls/Conversation.xaml.cs

@@ -117,6 +117,17 @@ public Conversation()
             Separator.Foreground = Utils.ForegroundIncoming;
             Username.Foreground = Utils.ForegroundIncoming;
             SendButtonEnabled = false;
+            Loaded += Conversation_Loaded;
+            Unloaded += Conversation_Unloaded;
+        }
+
+        private void Conversation_Unloaded(object sender, RoutedEventArgs e)
+        {
+            Window.Current.Activated -= HandleWindowActivated;
+        }
+
+        private void Conversation_Loaded(object sender, RoutedEventArgs e)
+        {
             Window.Current.Activated += HandleWindowActivated;
         }