Update the URL when creating new record

When record saved is new, the URL must be updated just like if the view was
switched.

Closes #13849
(grafted from 49cbc9b99ed8883aac4bd1f252d6100a20cc9864)

--HG--
branch : 6.0

sao/src/screen.js

@@ -1568,6 +1568,7 @@
         },
         save_current: function() {
             var current_record = this.current_record;
+            let new_record = current_record.id < 0;
             if (!current_record) {
                 if (this.current_view &&
                     (this.current_view.view_type == 'tree') &&
@@ -1611,6 +1612,9 @@
                     path.splice(-1, 1,
                             [path[path.length - 1][0], current_record.id]);
                 }
+                if (new_record && this.switch_callback) {
+                    this.switch_callback();
+                }
                 return this.group.get_by_path(path).then(function(record) {
                     this.current_record = record;
                 }.bind(this));