QQC2's scroll view does not allow clicking through the scroll bars even
if they are invisible. That's a shame, but we're not going to fix it in
QtCreator. Rather, choose locations to click on that are outside of the
scroll bars.
Also, wait for the window to be exposed before manipulating it.
Change-Id: I7d8de1a6be7dec88c5d0ac1707341b543e385a9e
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
663a12e00f