Javadoc
Try to determine which model should be used as initial selection. First, retrieve the model that represents the
actual selected node and see if it is valid. If so, select it and return, if not, see if a last visited model
is set and if so select it and return. If not, see if a default model is set, if so, select it and return. If
not, fallback to the model currently in the selectionModelReference.
TODO: We should try and see if the last-visited model is visible in the browser, if not, go on to default model