The goal is to provide a better feedback to the user, especially in mobile mode. With this commit, when switching menus, we clear the screen and display an empty control panel (only for act_window actions though) so we have some initial content that get filled as soon as the view/action is ready. Task 2900847 closes odoo/odoo#124068 Related: odoo/enterprise#43038 Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>