Extend CorpusList for use in public corpora route

app/static/js/RessourceLists/CorpusList.js

@@ -1,4 +1,12 @@
 class CorpusList extends RessourceList {
+  static instances = [];
+
+  static getInstance(elem) {
+    return CorpusList.instances.find((instance) => {
+      return instance.listjs.list === elem;
+    });
+  }
+
   static autoInit() {
     for (let corpusListElement of document.querySelectorAll('.corpus-list:not(.no-autoinit)')) {
       new CorpusList(corpusListElement);
@@ -59,6 +67,7 @@ class CorpusList extends RessourceList {
 
   constructor(listElement, options = {}) {
     super(listElement, {...CorpusList.options, ...options});
+    CorpusList.instances.push(this);
   }
 
   init(user) {