Wrong Order aof Mount/Unmount Actions

Summary

Reported by Robert Wiesen@UFZ

Steps to reproduce

Mount and UnMount a device at same timepoint

What is the current bug behavior?

Unmount is show before Mount in time beam

Possible fixes

• change the Order in case of same timestamp (f.e. by adding a epsilon-time-offset to unmount)
• maybe think about a deletion of such a Mount/unmount - normally the user intent to do that in this case

ToDo's

• Bug reproduced
• Cause found
• Bug fixed