title: Prevent toolbar popup window from disappearing
body: <p>In my chrome extension I use a toolbar-button-popup-window, with the list of last focused window tabs. A click on some list item sets that tab to active via chrome.tabs.update(I don't know another way to do that). After that click popup window disappears. I would like to keep it visible, at least until a click outside that window. Is there a way to do that?</p>