Changeset 14523

#2524:

• Renamed pausable to SupportsPause
• Changed SupportsPause field to abstract property that has to be implemented
• Stored initialization flag in BasicAlgorithm
• Changed CancellationToken access to use the according property
• Adapted HillClimber to new pausing mechanism
• Disable pause for PPP, because it does not work correctly
• Derived FixedDataAnalysisAlgorithm from BasicAlgorithm
• Changed base class of all data analysis algorithm from BasicAlgorithm to FixedDataAnalysisAlgorithm