Migrated from NovaTec Jira. Original ticket: INSPECTIT-847
Goal: Allow to add comments and/or markers to elements within an invocation sequence.
Usecase: During the analysis a few problems are found. Apart from adding them as labels to a storage (nice!) one could add comments to the exact elements in the invocation sequence. In addition one can also perhaps also add markers.
The synchronization should exists over all users, so that they can see each others comments/markers. Saving invocation to storage should also include the comments.