Fixed expand flicker

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

@@ -2934,8 +2934,10 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                     expand = messages.get(0);
 
                 if (expand != null &&
-                        (expand.content || unmetered || (expand.size != null && expand.size < download)))
+                        (expand.content || unmetered || (expand.size != null && expand.size < download))) {
                     iProperties.setValue("expanded", expand.id, true);
+                    return true;
+                }
             }
         } else {
             if (autoCloseCount > 0 && (autoclose || autonext)) {