[IMP] web: improve act_url
[IMP] web: improve act_url

By default, Chrome browser will block pop-up windows which will block
all actions from type act_url with a different target than 'self' (i.e.
'_blank').
This commit adds a check when such an action is called and sends a
warning in the web client when it fails to open. This mimics the
behaviour already present for the report actions.

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo