When editing a m2m avatar field in the list view, keyboard navigation,
e.g. pressing arrow-left when the focus is on the right-most item,
results to a crash. Also, the "delete" button when in edit mode
is not there anymore so the user is unable to remove items.

This is because we are not building the proper list of tags. More
specifically, we fail to provide `onKeydown` and `onDelete` handler
to the tags, thus, it crashes and no delete button. This proposed
change fixes both issues.

closes odoo/odoo#105435

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