shell: When saving profile text, auto-open the resulting file as a convenience.
PixelClassification: Replaced OpBlockedSparseLabelArray with OpCompressedUserLabelArray
OpPixelClassification: Removed obsolete OpShapeReader helper.
DataSelection: Print traceback on error.
tests: testSerializer: Use OpCompressedUserLabelArray instead of OpBlockedSparseLabelArray
Removed unused import
example labeling applet: Upgraded to current codebase so it works again.  Also, use OpCompressedUserLabelArray instead of OpBlockedSparseLabelArray