Show nav folder last sync time

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

@@ -129,7 +129,6 @@ public class AdapterNavFolder extends RecyclerView.Adapter<AdapterNavFolder.View
             tvItem.setTypeface(count == 0 ? Typeface.DEFAULT : Typeface.DEFAULT_BOLD);
 
             tvItemExtra.setText(folder.last_sync == null ? null : DTF.format(folder.last_sync));
-            tvItemExtra.setVisibility(debug ? View.VISIBLE : View.GONE);
 
             ivExternal.setVisibility(View.GONE);
             ivWarning.setVisibility(folder.error == null ? View.GONE : View.VISIBLE);