Merge pull request #1 from mikkoharju/master

Fixup the windowmanager extension code
Make surfaces visible by default

Also be explicit about the visibility, always send the notification
when a surface is set to QWaylandSurfaceItem

Change-Id: I3507399620bfcc078f7dcd6319f2b55ed1c1f3ad
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Fixed uninitialized member variable
Merge pull request #2 from mikkoharju/expose

Pull in Make surfaces visible by default, fix initialization
Remove deadlock in resize

However, this leaves the unfortunate problem that resizing QQuickView is
not looking as smooth as one could wish for

Change-Id: I369ede46a8345bfc3867cf13251a5ad6cac5ee3f