Stretch does not update popup size on window resize / orientation change

[Vovan-VE]

Steps to reproduce:

1. Simple demo: http://react-component.github.io/trigger/examples/simple.html
2. placement = bottom left ; stretch = width / winWidth ; trigger = [ click ]
3. Click test area to trigger a popup.
4. Change screen orientation (resize window).

As the result the popup takes unexpected size from previous orientation. This may cause a visual mess on mobile screen.