[FIX] mass_mailing: fix toggleLinkTools

The lack of a default `options` parameter for `toggleLinkTools` led to a trace
when this method was called without parameters.
This method was introduced by [1].
This commit fixes it by adding an empty object as default parameter.

[1]: https://github.com/odoo/odoo/pull/106796/commits/862d93f9eef16ec45b0d27b246fae560f7feaf1e

task-3149496
opw-3149496
opw-3151829

closes odoo/odoo#111222

X-original-commit: 24293e2a3217d0b851a3ab1c083f2984efb31d60
Signed-off-by: Antoine Guenet (age) <age@odoo.com>

addons/mass_mailing/static/src/js/wysiwyg.js

@@ -21,7 +21,7 @@ const MassMailingWysiwyg = Wysiwyg.extend({
         return res;
     },
 
-    toggleLinkTools(options) {
+    toggleLinkTools(options = {}) {
         this._super({
             ...options,
             // Always open the dialog for the basic theme as it has no sidebar.