Editor: Add "File -> Close All Except Visible"

Task-number: QTCREATORBUG-9893

Change-Id: I019ddd28235ae34c70d59bb1c0059b1a6732f433
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Help plugin: Synchronize qmake and qbs project files.

We now use Qt Webkit in the qbs build as well.

Change-Id: Ib27a0d795bca3b266ee405ce2d925a96297f8c25
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Simplify app_version_header.qbs.

It's no longer necessary to forward the project properties like that.

Change-Id: I751388e042e6c5a3bfb23a29f56a4d8b34b422dd
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>