L3 - Default Description
Reproduce:
- user invoice showcase
- navigate to a process instance
- select the top element of the tree
Problem:
- no variables are shown although all variables should be shown
if execution is SCOPE and execution is ACTIVE
if VARIABLE.TASK_ID != null => ACTIVITY_INSTANCE_ID_ is EXECUTION.ACTIVITY_INSTANCE_ID_
else
if EXECUTION.ID_ == EXECUTION.PROCESS_INSTANCE_ID_ => ACTIVITY_INSTANCE_ID is EXECUTION.PROCESS_INSTANCE_ID_
else ACTIVITY_INSTANCE_ID is PARENT EXECUTION.ACTIVITY_INSTANCE_ID_
else
ACTIVITY_INSTANCE_ID_ is EXECUTION.ACTIVITY_INSTANCE_ID_
OR add ACT_INST_ID_ column to ACT_RU_VARIABLE table
