Disable long press when selecting folders

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

@@ -146,12 +146,14 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
         private void wire() {
             view.setOnClickListener(this);
             ivExpander.setOnClickListener(this);
+            if (listener == null)
                 view.setOnLongClickListener(this);
         }
 
         private void unwire() {
             view.setOnClickListener(null);
             ivExpander.setOnClickListener(null);
+            if (listener == null)
                 view.setOnLongClickListener(null);
         }