Before recent refactoring (done by Marco) the node instances were not
able to handle outside the current state. So we had to change back to
the base state for all base state changes from the rewriter.

This is not necessary, anymore.

Reviewed-by: Marco Bubke

The states editor horizontal scrollbar was broken because the
setCurrentStateSilent() call was causing a loop, calling
nodeInstancePropertyChanged() when state property is changed. Because
rendering of states changes the "state" property, the calls never
stopped. Now StatesEditorView has a flag which prevents the loop.

Reviewed-by: Christiaan Janssen

Reviewed-by: kkoehne

Reviewed-by: Marco Bubke

Reviewed-by: Thomas Hartmann

Schedule a redraw of the states icons when an element is removed from
the model.

Task-number: BAUHAUS-460
Reviewed-by: Christiaan Janssen

Task-number: BAUHAUS-424
Reviewed-by: Lasse Holmstedt

Let the State Editor also use the new activateState method from
QmlModelView (stateChanged by default does now nothing). This allowed
us to get rid of the setCurrentStateBack method. Also fix deletion of
states - the "decision" which state should be the new one is now done
in StatesEditorView.

Reviewed-by: Thomas Hartmann
Reviewed-by: Christiaan Janssen

The usage of 'int newIndex' was ambiguous in the case of
oldIndex < newIndex. Solved by directly passing the ModelNode that was
moved around.

'nodeSlidedToIndex' was also renamed to 'nodeOrderChanged', since
'Slided' is no proper English.

QmlDesigner.statesEditor: thumbnail update at state removal moved to propertiesAboutToBeRemoved method

This adds a new "Design" mode that can be used to manipulate qml files
in a visual way. It will only get build if you have the declarativeui
module in Qt.

This is a squashed import from the Bauhaus project. Share & enjoy :)