[FIX] web: add 'forget' commands in AbstractManyField

addons/web/static/src/js/views/form_relational_widgets.js

@@ -599,6 +599,14 @@ var AbstractManyField = common.AbstractField.extend({
         return this.send_commands([COMMANDS.delete(id)]);
     },
 
+    /*
+    *@value: id {int or string} id or virtual id of the record to removes relation (unlink or delete function of field type)
+    *@return deferred
+    */
+    data_forget: function (id) {
+        return this.send_commands([COMMANDS.forget(id)]);
+    },
+
     /*
     *@value: ids {array} list of ids or virtual ids of the record who replace the previous list
     *        options {object} options sent to the dataset
@@ -646,6 +654,8 @@ var AbstractManyField = common.AbstractField.extend({
                         });
                     case COMMANDS.UPDATE:
                         return dataset.write(command[1], command[2], options);
+                    case COMMANDS.FORGET:
+                        return dataset.remove_ids([command[1]]);
                     case COMMANDS.DELETE:
                         return dataset.unlink(command[1]);
                     case COMMANDS.LINK_TO: