Since 0eff29409d, the behavior was
unpredictable when clicking on multiple companies before a reload.
This simplifies the implementation and the behavior:
* the behavior is always the same even if there were already multiple
companies selected: if one wants to add new companies they should use
the check box instead.
* there is no more confusion due to the storage of the symetrical
difference when toggling multiple companies and their children before
the reload.
closesodoo/odoo#135086
X-original-commit: b07b30cd4b2a3e821a24761075ae0aecee332b14
Related: odoo/enterprise#47265
Signed-off-by: Bastien Fafchamps (bafa) <bafa@odoo.com>
Signed-off-by: William André (wan) <wan@odoo.com>