Fixed multi pane subtitle

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

@@ -1352,6 +1352,7 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
         else {
             pane = R.id.content_pane;
             grpPane.setVisibility(View.VISIBLE);
+            args.putBoolean("pane", true);
         }
 
         FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();

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

@@ -121,7 +121,8 @@ public class FragmentEx extends Fragment {
 
     private void updateSubtitle() {
         AppCompatActivity activity = (AppCompatActivity) getActivity();
-        if (activity != null) {
+        Bundle args = getArguments();
+        if (activity != null && (args == null || !args.getBoolean("pane"))) {
             ActionBar actionbar = activity.getSupportActionBar();
             if (actionbar != null)
                 actionbar.setSubtitle(subtitle);