[FIX] web: dialog close with a reason

In the below revision:
c0db6aec56

The dialog close `reason` was introduced
to not reload the current form if the dialog
has been closed for a reason
(e.g. a window action was returned by the server).

This is to prevent the record reload, which:
 - Is useless, as another action has been launched
   and the user therefore redirected elsewhere
 - Can fail, in the case the initial action deleted
   the current record
   (e.g. when merging a lead in an opportunity, the
   lead is removed, and therefore this is not possible to reload
   it).

 opw-680180

addons/web/static/src/js/framework/dialog.js

@@ -124,11 +124,11 @@ var Dialog = Widget.extend({
         this.$modal.modal('hide');
     },
 
-    destroy: function() {
+    destroy: function(reason) {
         if(this.isDestroyed())
             return;
 
-        this.trigger("closed");
+        this.trigger("closed", reason);
 
         this._super();