toolbar process menu stay visible after form is opened

Steps :

Create a process that will open the Create Invoice (manual) form and use it on Sales Order / Order Line tab.

Log in GardenWorld and goto Sales Order. Click on the lines toolbar button process and select your process. The form will open but the menu will remain visible until you click somewhere.

nb: i've done it just now on demo.idempiere.com

Regards,

Nico