[FIX] mass_mailing: prevent use of unsupported image transform option

The image transform option uses the `transform` CSS property, which is
very poorly supported in email clients. This hides that option so as to
avoid bad surprises.

task-2802705

closes odoo/odoo#88052

X-original-commit: 611c9a2aa65f3c6f9e1c0780cb9177bc1e67513d
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>

addons/mass_mailing/static/src/js/mass_mailing_snippets.js

@@ -197,6 +197,23 @@ options.registry.BackgroundImage = options.registry.BackgroundImage.extend({
 
 options.registry.ImageTools.include({
 
+    //--------------------------------------------------------------------------
+    // Public
+    //--------------------------------------------------------------------------
+
+    /**
+     * @override
+     */
+    async updateUIVisibility() {
+        await this._super(...arguments);
+
+        // Transform is _very_ badly supported in mail clients. Hide the option.
+        const transformEl = this.el.querySelector('[data-transform="true"]');
+        if (transformEl) {
+            transformEl.classList.toggle('d-none', true);
+        }
+    },
+
     //--------------------------------------------------------------------------
     // Private
     //--------------------------------------------------------------------------