Initialize list state

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -5982,6 +5982,8 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                 getContext(), getViewLifecycleOwner(),
                 viewType, type, account, folder, thread, id, threading, filter_archive, criteria, server);
 
+        initialized = false;
+        loading = false;
         vmodel.setCallback(getViewLifecycleOwner(), callback);
         vmodel.setObserver(getViewLifecycleOwner(), observer);
     }