Before this commit: the action menu registry items were rendered
regardless of their inner state. The problem is that these item
components can choose not to render themselves, leading to a blank
dropdown menu if no other item was present.

To fix this, the "getProps" function of the registry has been altered to
act as validation: the item will not be rendered if the return value is
falsy. The function has also been made asynchronous to allow RPC calls.

This solution is still flawed and hides a bad design choice which is to
register components and not items or item getters; this API is too
complex for its use case(s) and adds pointless depth to the DOM. The
shape of the registry should be simplified in an improvement in master.

closes odoo/odoo#59254

Task: 2325587
X-original-commit: 45c7d881a5d130f6b3222749c8c87b6c6b45e910
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Co-authored-by: Julien Mougenot <jum@odoo.com>
Co-authored-by: Mohammed Shekha <msh@odoo.com>

This commit allows the user to apply actions to all records
matching the current domain in list views. It also ensures that
the user is aware of the set of records actually selected.

The number of selected records is now displayed in the control
panel, and the user can, with an additional click, select all
records matching the current domain instead of the ones of the
current page.

Task 2185145

Before this commit, the context sent by an action performed by the action menu
could hold an 'undefined' select_all key, which would cause the context evaluation
to crash.

Now, the select_all key is defaulted to 'false' and does not crash in actions that
do not provide it.

closes odoo/odoo#47745

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>

Use of the new helpers in control panel (and subcomponents) tests and addition
of new tests.

Part of task 2196029

Co-authored-by: Mathieu Duckerts-Antoine <dam@odoo.com>