#128 1.7.0 - cant reverse-indent task

[Axel Braun]

Have a group of subtask und one higher level-Task
create a new task between subtask 2 and 3
Now try to reverse-indent this task (so it is on the same level as the higher level task)
Result: Subtask is moved to the end of group, and reverse-indented
Expected result: Subtask stays where it is, indentation is moved to higher level (task 3 and 4 are now grouped under this task