Debugger: Fix "Show in separate window" for string-like classes

Change-Id: I036be36070444cd761f215f3d60b9db25a5c149a
Reviewed-by: hjk <hjk121@nokiamail.com>
Qbs: Fix qbs install step

Fix setting the installroot of the qbs install step.

Task-number: QBS-353
Task-number: QBS-354
Change-Id: Ia99abd3044a9ec90c67de3060d5895ae0b6b8652
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>