Fields table does not cleared after changing execution listener class implementation

[artemy63]

TC

1. Create two implemenattions of org.flowable.engine.delegate.ExecutionListener or org.flowable.engine.delegate.JavaDelegate
2. Place into on of them some expressions, like private Expression fixedValue;
3. Go into BPMN modeler, navigate to Executions listeners table and open Execution listener editor
4. Select as class implementation class with injected field ER = AR Fields table are filled with injected into class expression
5. Choose another class without any injected expressions ER: fields table is empty AR: fields table does not change it state
6. Choose empty value as class ER: fields table is empty AR: fields table does not change it state

[maistrenkoIulia]

verified