timestamp clustering

[OlafHaag]

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For logs, that accumulate information from different runs of a task, it would be neat if the time stamps in front of any line could get clustered by adding color to them. So when a sudden large difference in the time stamp from one line to the next occurs, it would mean a new scan was performed and the following time stamps would get another color until a new jump appears, hence forming a cluster, that visually disinguishes different outputs from different runs in one file.