Show result when searching for subordinate processes

[matthias-ronge]

If you expand a parent process in the process list and search for the child processes, this often results in an empty list in the result. The assumption is that all subordinate processes have already been completed and are therefore not visible. However, that's not the expected result.

Goal: If search is an empty result, ir should automatically show completed processes, and output a message, such as: Completed processes were automatically displayed so that search results are displayed. If some processes in the result are completed, a message should also be displayed that there is more and the user can show them (given the switch for this has been installed).