Site is not correctly updated after deleting its template

[sgauruseu]

1. Create a site , do not select a controller
2. Add a template, select site in support, insert a text component with a image , for example
3. Open the site - the tmplate is applied for the site - OK

4. Do not close the site wizard tab, switch to grid and delete the template
5. Switch to the site again

BUG - The deleted template is still applied in the site