[FIX] portal: show default lang in selector when lang is not found

STEPS:
* install project, website
* install translation, but don't apply to website
* create a task with Customer that has that language
* close the task
* open rating request message in ``Settings >> Technical >> Messages``
* click any of the smiles

BEFORE:

Error to render compiling AST
IndexError: list index out of range
Template: portal.language_selector
Path: /t/t[1]
Node: <t t-set="active_lang" t-value="list(filter(lambda lg : lg[0] == lang,
languages))[0]"/>

AFTER:
no errors, page is translated to customer's language, though language selector
shows default website's language

---

opw-2416586

closes odoo/odoo#63526

Signed-off-by: Ivan Yelizariev // IEL <yelizariev@users.noreply.github.com>

0 files changed, 0 insertions, 0 deletions