Support getting task details using id

[keraan]

The following is code from selected-task-service.ts.
None of the code elsewhere ever uses selectedTaskService.setSelectedTask(number), so this code never ran before.
Attempting to gives the following error:
GET http://localhost:3000/api//projects//task_def_id/ 400 (Bad Request)

public setSelectedTask(task: number | Task) {
    if (typeof task === 'number') {
      this.taskService.get(task).subscribe(this.task$);    // THIS LINE HERE
    } else {
      this.task$.next(task);

      task?.getSubmissionDetails().subscribe();
    }
    this.checkFooterHeight();
    this.showSubmission();
  }

[keraan]

@macite