Frontend: Add all remaining JavaScript modules to the import map.

Change-Id: I6bdc929a29ebf7e2de893ce984b42862680e21c6
diff --git a/src/main/resources/META-INF/resources/admin/index.html b/src/main/resources/META-INF/resources/admin/index.html
index 0464f63..6e91fd4 100644
--- a/src/main/resources/META-INF/resources/admin/index.html
+++ b/src/main/resources/META-INF/resources/admin/index.html
@@ -10,6 +10,8 @@
   <script type="importmap-shim">
   {
     "imports": {
+      "loose-envify": "/node_modules/loose-envify/loose-envify.js",
+      "js-tokens": "/node_modules/js-tokens/index.js",
       "symbol-observable": "/node_modules/symbol-observable/es/index.js",
       "redux": "/node_modules/redux/es/redux.mjs",
       "lit-html": "/node_modules/lit-html/lit-html.js"