correct the first 2 tests of object classification
fix all object classification tests
renamed feature slots to make them more obvious
cleaning up object extraction tests
adapted object extraction tests to new feature data structure.
comments to explain the feature slot nested dictionaries.
OpDataSelection: Extra assertions.
DataSelection: Disable 0.5 import for now.
Dataset table: context menu: disable 'edit' option if dataset hasn't even been chosen yet.
DataSelection: Serializer supports new multi-dataset scheme. (Importing from 0.5 not supported yet.)
DataSelection: Serializer: Fixed dirty status after deserialization.
DataSelection: Tables show row numbers.
DataSelection: Added nickname field.  Save axistags as a dataset info field.
DataSelection: Fix serialization of axistags settings.
Dataset Properties Editor: Support selection of channel display settings.
dataset properties editor: Don't show internal path as part of link path.
DataSelection: Gui: Show selected dataset now matter which table you're using, use role names as layer names.
cache memory dialog handles exception if operator does not support report generation
remove synapse workflows from startup, put object prediction workflow there
refactored gui warnings for object workflow