Before this commit, cycling between chat window in LTR language clycled in the wrong direction. This commit also handle the RTL language cycling. task-2279706 closes odoo/odoo#55456 X-original-commit: 638720f9d72616f2e921a475a5fdfd2ad9a2ab8b Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com> Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>