This is a possible alternative to #734. The idea is to have a state entry on the session that shows whether a change is currently in progress. UI components could then use this state to e.g. disable editing fields while a change is in progress.
This is in response to reports that sometimes editors make several changes in rapid succession and some of them get rejected due to conflicts on the backend. This would not have the explicit confirmation of #734, which could be more a more smooth experience, but still allows users to know their change has finished successfully on the backend.