[Proof Reading] Segment names get lost on split

[hotzenklotz]

Detailed Description

When using the proof reading tool I constantly get lost. I renamed my main cell/segment to keep track of it, e.g. "Neuron #3". Whenever I execute a split there is a 50:50 chance that my main segment (which is considerably larger) is split of as a new segment with a generic "Segment 123" name. The remaining split-off segment (==trash) keeps the custom name, which is incorrect.

Expected: The larger segment should always retain the same name (and color).

Context

• Specific to long-running jobs (set jobsEnabled=true in application.conf)
• Specific to webknossos.org (set isDemoInstance=true in application.conf)

[hotzenklotz]

Related to #6470

[philippotto]

Closing in favor of #6470.