enhance(perf): add :ref/linked-references-collapsed-threshold option

Related to #2792

src/main/frontend/state.cljs

@@ -1378,6 +1378,14 @@
        value))
    2))
 
+(defn get-linked-references-collapsed-threshold
+  []
+  (or
+   (when-let [value (:ref/linked-references-collapsed-threshold (get-config))]
+     (when (integer? value)
+       value))
+   100))
+
 (defn get-events-chan
   []
   (:system/events @state))