Before this commit: when user selects company from company switcher, page is
reloaded, what if user wants to select multiple companies from dropdown, he
have to wait for page reload and need to do same process again.
After this commit: when user selects company from company switcher, page
will not reloaded as soon as user toggles checkbox, user will given time to
select another item or unselect other item from dropdown, so user can select
multiple companies or unselect multiple companies.
task-2467747
closesodoo/odoo#70799
Related: odoo/enterprise#18376
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>