[AC-2726] regression: open > hide > close window loses focus on parent.

I am using a 'worker' window, for a separate thread to download and sync new data with the app. I do this by opening a new window, hiding it and after it's done, closing it; so the user doesn't experience any hiccups and it happens async. This works fine in 1.6.1 but in 1.7.0RC1 the whole app loses focus and I can't even tap on the tabbar or anywhere else, force close is the only way to go. Code to reproduce: In an active window: var newWin = Ti.UI.createWindow({url:'worker.js'}); newWin.open(); newWin.hide(); and in worker.js if (doSomeStuff()){ Ti.UI.currentWindow.close(); }