All periods should be displayed with the "Show Daily Plan" operation

Current Situation

The "Show Daily Plan" operation in the Job or Order action menu sometimes does not display all periods of the run-time.
If the run-time contains two periods and both have the same "begin" or one has a "begin" for the same point in time where the other has a "single_start" then only the first period is displayed.

  <run_time>
    <weekdays>
      <day day="1 2 3 4 5 6 7">
        <period single_start="04:00:00"/>
        <period begin="04:00:00" end="05:00:00" absolute_repeat="01:00:00"/>
      </day>
    </weekdays>
  </run_time>

Desired Behavior

All periods should be displayed.

Note

The daily plan shows not periods but start times.
In the given example the job will be started once at 04:00:00. This start is shown in the daily plan. So, this is the desired behavior.