Selectbutton of the Toolbar in the Popup will float below the Popup

Suite and Optimus Suite 7
#1

Hi, The selectbutton of the Toolbar in the Popup will float below the Popup after clicking. How can I set it to the top?

image

#2

Please, try to add the following css:

    .dhx_menu{
        z-index: 2147483647;
    }