[FIX] web: action url never call on_close method

On a tree view:
- Add a button returning an `act_url` action; e.g.:
```
@api.multi
def open_google(self):
    return {
        'type': 'ir.actions.act_url',
        'url': 'https://google.fr/',
        'target': 'new',
    }

```
- Click on a button

The action call works only once because the button is never re-enabled.

The button is actually enabled only at view rendering. Therefore, we
call `on_close` in order to reload the view.

opw-784587

addons/web/static/src/js/action_manager.js

@@ -790,7 +790,7 @@ var ActionManager = Widget.extend({
             });
         });
     },
-    ir_actions_act_url: function (action) {
+    ir_actions_act_url: function (action, options) {
         var url = action.url;
         if (session.debug && url && url.length && url[0] === '/') {
             url = $.param.querystring(url, 'debug');
@@ -800,6 +800,7 @@ var ActionManager = Widget.extend({
             framework.redirect(url);
         } else {
             window.open(url, '_blank');
+            options.on_close();
         }
         return $.when();
     },