FIX: increase max favorite badges to 6 (#13507)

Limit was 5 with the assumption that trust level badge
will be the 6th badge. With trust level badges disabled,
it should be possible to increase this to 6, or even more imo.

config/site_settings.yml

@@ -311,7 +311,7 @@ basic:
     client: true
     default: 2
     min: 0
-    max: 5
+    max: 6
   enable_whispers:
     client: true
     default: false