Unwanted message "scheduled for state change" when executing a scheduled transition

Problem/Motivation

When a scheduled transition is executed by the user, either by setting a time in the past, or by setting the time to 'immediate', the message "Entity scheduled for state change" is displayed. This is wrong. It should only appear when the transition is still scheduled.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes