ENCOUNTERED ISSUE:
Unable to close a dropdown with ESC when the focus has been given
to a select element inside the dropdown.
TO REPRODUCE:
i.e. in the searchpanel, go to "FilterMenu > Add Custom Filter" and
open the field select element.
Press ESC once: the field select element closes just fine.
Press ESC a 2nd time: we expect the dropdown to close but nothing occur.
REASON EXPLANATION:
Since 84715436d our Dropdown component uses the 'dropdown-menu'
bootstrap class.
But under some conditions bootstrap stops the keydown events propagation
when the event.target matches the query selector '.dropdown-menu'.
IMPLEMENTED FIX:
This commit refines this selector directly inside the bootstrap library.
This is admittedly a bad practice but:
- this modification is trivial and sensible
- the modified selector is only used locally
in the bootstrap's 'dropdown.js' file
- the added test should prevent the lost of
this customization in the future
task-2764821
Part-of: odoo/odoo#84969
Bruno Boi
78f85f2725