[REF] web: Update generic files

General cleaning of some helpers and generic files. The idea is that they are
less likely to be entirely re-written in the near future so this is a way to
keep the code clean, readable and compliant to the current standards. Changes include:
- Use of async/await when possible
- Use of const/let instead of var
- Removal of underscore.js
- Use of native JS instead of jQuery when possible

The logic of the affected code remains the same.

1 files changed, 1 insertions, 1 deletions

diff --git a/addons/mail/static/tests/helpers/test_utils.js b/addons/mail/static/tests/helpers/test_utils.js
index d3f7081eef6..90317900660 100644
--- a/addons/mail/static/tests/helpers/test_utils.js
+++ b/addons/mail/static/tests/helpers/test_utils.js
@@ -26,7 +26,7 @@ var Widget = require('web.Widget');
  * This is async due to mail_manager/mail_service that needs to be ready.
  *
  * @param {Object} params
- * @return {Promise} resolved with the discuss widget
+ * @returns {Promise<Discuss>}
  */
 async function createDiscuss(params) {
     var Parent = Widget.extend({