Make sure to use transpiled modules

src/build.js

@@ -15,7 +15,9 @@
         "converse-headline":        "builds/converse-headline",
         "converse-mam":             "builds/converse-mam",
         "converse-minimize":        "builds/converse-minimize",
+        "converse-modal":           "builds/converse-modal",
         "converse-muc":             "builds/converse-muc",
+        "converse-muc-views":       "builds/converse-muc-views",
         "converse-muc-embedded":    "builds/converse-muc-embedded",
         "converse-notification":    "builds/converse-notification",
         "converse-otr":             "builds/converse-otr",