Debugger: Regression cleanup

Sneaked in with 40052046fdb2d5.

Change-Id: I711c5b8e6869647a447a5f17f693de571b5f0337
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
QmlDesigner: Remove qDebug

Change-Id: I11dfccf77ba413f602edfe16e384c47c68081be5
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner.PropertyEditor: Final fixes for gradient editing

We react to selection change now and keep the selection.

Change-Id: I847b8cf308277df92295822f9cd18ebb58cc2ba0
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>