In the search panel, if a select multi was grouped by a field that can
take the value 'false' (like a char field), that value would be confused
with the value false and the group 'false' would never be
displayed (its values would be put in the group false).
This commit avoids that situation by using JSON.stringify instead of
the implicit stringification done when using a value as an object key.
closesodoo/odoo#50647
X-original-commit: 5b19e6c13b636d108e8aa1a09f01124fdb38a577
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Mathieu Duckerts-Antoine
9c2a0f1db7