...
The toolbar 'toolbarGo' attribute value should be set to '$ crm.saveNewRecord(self);'.
When calling this method(on toolbar check mark button click) the saving of the newly created record
will be performed and if the saving was successful , it it will also close the add dialog.
You could also specify the repository object name used for loading/opening the newly created record as the second paramenter to the saveNewRecord method:
'$ crm.saveNewRecord(self, 'openUserDialog');'. This will use the given repository name to open the newly created record in its own screen.
...