[FIX] web_editor: fix module auto install with web

The web_editor dependency with mail was problematic:
- web_editor would not auto_intall without the mail being installed
- A circular dependency problem with discuss

In order to avoid creating a new module shared by mail
and web editor, the use of a hack has been decided.
By checking if `notification_type` is in the session, we ensure
that the module mail is installed.

Task-2698655

closes odoo/odoo#80640

X-original-commit: 4e611d7527f85fc074115bd018adb7d6e5ea2c53
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>
Co-authored-by: Antony Lesuisse <al@odoo.com>

addons/web_editor/__manifest__.py

@@ -9,7 +9,7 @@ Odoo Web Editor widget.
 ==========================
 
 """,
-    'depends': ['web', 'mail'],
+    'depends': ['web'],
     'data': [
         'security/ir.model.access.csv',
         'data/editor_assets.xml',

addons/web_editor/static/src/js/wysiwyg/wysiwyg.js

@@ -82,7 +82,11 @@ const Wysiwyg = Widget.extend({
         const commands = this._getCommands();
 
         let editorCollaborationOptions;
-        if (options.collaborationChannel) {
+        if (
+            options.collaborationChannel &&
+            // Hack: check if mail module is installed.
+            this.getSession()['notification_type']
+        ) {
             editorCollaborationOptions = this.setupCollaboration(options.collaborationChannel);
         }