Before this commit it was possible to activate the overlay of the
arrows of the gallery snippet (with themes because of animation
options)

task-2312878

closes odoo/odoo#59860

X-original-commit: d74b7618c750724c2efe448c57b07c6d6191e375
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>