Removing elements from list variables or map variables should remove elements from related schedules

Current Situation

• Assume a workflow that declares a list variable or map variable with elements A1 and A2.
• The workflow is assigned a schedule.
• When removing element A1 from the list variable or map variable, then the schedule still contains the element.

Desired Behaviour

• When removing an element from a workflow's list variable or map variable, then the element should be removed from the schedule too.