Dropdown does not disapear if opened via sv-buttons arrow-down

[christophstocker]

If I open the selection box via the sv-buttons arrow-down and click to another region on the page the selectable list does not disapear.
If I click inside the input field the selectable list disapears on clicking another area of the page.
I would like to have same behaviour for both actions - hide selectable list on clicking another area of the page.