[IMP] mail: guard AttachmentDeleteConfirmComponent

Task-2797754

closes odoo/odoo#86706

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/mail/static/src/components/attachment_delete_confirm/attachment_delete_confirm.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <templates xml:space="preserve">
     <t t-name="mail.AttachmentDeleteConfirm" owl="1">
-        <div class="o_AttachmentDeleteConfirm card bg-white" t-attf-class="{{ className }}" t-ref="root">
-            <t t-if="attachmentDeleteConfirmView">
+        <t t-if="attachmentDeleteConfirmView">
+            <div class="o_AttachmentDeleteConfirm card bg-white" t-attf-class="{{ className }}" t-ref="root">
                 <h4 class="m-3">Confirmation</h4>
                 <hr class="mt-0 mb-3"/>
                 <p class="o_AttachmentDeleteConfirm_mainText mx-3 mb-3" t-esc="attachmentDeleteConfirmView.body"/>
@@ -11,7 +11,7 @@
                     <button class="o_AttachmentDeleteConfirm_confirmButton btn btn-primary me-2" t-on-click="attachmentDeleteConfirmView.onClickOk">Ok</button>
                     <button class="o_AttachmentDeleteConfirm_cancelButton btn btn-secondary me-2" t-on-click="attachmentDeleteConfirmView.onClickCancel">Cancel</button>
                 </div>
-            </t>
-        </div>
+            </div>
+        </t>
     </t>
 </templates>