Vaadin 7 bug workarounded - when minimize stack or editor and perform
fast fiew, then restore minimized element using fast fiew restore button
(not from minimized toolbar) - the minmax button of restored stack
disappear. This caused by vaadin 7 bug - when some component become the
content of window (fast view in this case) and removed from window the
position:absolute don't removed from style of this component.
Workarounded by inserting wrapper layout between fast view window and
minimized component.