QmlDesigner: remove commented connect

The connected SLOT is even not existing any more.

Change-Id: Iea352ca4929146c20b897e1a8fbb00a601364068
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: remove unnecessary spaces/lines

Change-Id: I867ab5afc82e67644b7004e97886b46250f5d3df
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: use engine argument like all similar methods

Change-Id: I1238cbd60e38ade3f54937ca8f901517c543a3ad
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>