Some option sections are feeling really laggy (especialy the theme ones
we now have in master/13.2). This was due to the "preview" activation of
the snippet being triggered on mouseover and not on mouseenter.

Introduced by: https://github.com/odoo/odoo/pull/36068



task-2198177

closes odoo/odoo#47303

X-original-commit: d85d912de513de5c81c85a8ff814e0af1e13cefd
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>