I mapped the windows key to `xfce4-popup-whiskermenu` to quickly open applications without leaving my keyboard. So when I'm looking for an application I just press the super key and type ahead and press enter. Sometimes there are more occurrences of the application I'm looking for. Now I thought I could press <TAB> to choose the next application in the list. Unfornately, the focus will skip to the icons on the upper right. I have to use the cursor keys then. This is not really a fast way, as I would prefer to tab cycle through the list.
The <TAB> key is supposed to move to the next widget. Use the <UP ARROW> or <DOWN ARROW> keys instead to cycle through the list of applications.
I would also like to have an option to set this behaviour. The <TAB> key is also used in other applications, like the address bar of chrome or firefox, to cycle throw the list of search suggestions. I think it would be more intuitive this way, at least when there is something typed in the search box.