Before this commit, when an invalid element was dropped (e.g. dragging a mention) the drop area freeze and make the UI unusable. task-2373971 closes odoo/odoo#61792 X-original-commit: 629b54dc1249c77d1e30240c0b5a91e22a1ae110 Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>