Main reason is that find-usages and refactoring broke completely.
Second reason is that concurrent modification was done on the
children-list while deleting/destructing.

This reverts commit b0b95f88.

 * Do not add menubars, etc. to mobile applications by default

The active runconfiguration is now the same as the one you are editing.

Reviewed-by: Thorbjørn Lindeijer

Qml allows property lists to be written as single properties, i.e.

  states: State {}

However, for the QmlDesigner model states is a list. Take care of this
in the texttomodelmerger.

Reviewed-by: Erik Verbruggen

This might stop random crashes when closing QmlDesigner.

Task-number: BAUHAUS-510

Reviewed-by: kh1

* made them a few pixels smaller
* they now animate when collapsed
* they no longer fade out when an error is reported

Reviewed-by: thorbjorn

Or when the list is empty because it is not supported, like when
creating a new project.

Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>