This commit adds `target=download`, as `target=self` adds some unwanted
visual effect. In other words, the "block UI" is never unblocked when
some actions are triggered. This is specific for "Download" actions as
the download is correctly executed, but the page is never `unload`.
e.g.:
```python
action = {
'type': 'ir.actions.act_url',
'url': '/web_enterprise/partner/%d/vcard' % record.id,
'target': 'self',
}
```
Note:
We can't use "'target': 'new'" as it creates a bug in Mobile Apps.
When The Mobile Apps create a new "Tab/Page", they do it in a new
sandboxed browsing environment, so the user isn't logged in and the
resource isn't accessible anymore.
Task ID: 3435131
closesodoo/odoo#134436
X-original-commit: 08db3deb3336f0c1ff9fe2703ebeb8ea5b5aeb3d
Related: odoo/documentation#5822
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>