BUG: Fixed save data dialog cras in case of certain node names

Save data dialog crashed if node name started with a non-drive-letter character followed by a colon. A zero is prepended to node names if it is in the form "1: Something", which is "cleaned up" by Qt to "1:\Something" on Windows, and crashes because the first character is not a letter in the path.

Fixed indentation issue in vtkSlicerApplicationLogic.cxx

git-svn-id: http://svn.slicer.org/Slicer4/trunk@24294 3bd1e089-480b-0410-8dfb-8563597acbee