ENH: Node attribute table view and widget moved to MRMLWidgets

Now both Data and Subject hierarchy modules use qMRMLNodeAttributeTableView and
qMRMLNodeAttributeTableWidget, so they have been moved from Data module widgets to MRMLWidgets

From: Csaba Pinter <csaba.pinter@queensu.ca>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23236 3bd1e089-480b-0410-8dfb-8563597acbee