Closing tab on a new form reload another record after not saving and don't close the tab.
Linked to https://hg.tryton.org/tryton/rev/5b4d41c301a3.
To reproduce (tryton >=5.8.3):
- Open a new tab (sales for instance)
- Create a new record
- Close the tab
- At the confirmation to save, click on "No"
- Another record will be displayed in form view instead of closing tab.