Show subtasks when project is filtered/sorted

I like the new feature when you can click on the black arrow and instantly view the sub tasks pertaining to that task.

However, this is only possible when viewing the full list without filters or sorting. I would like to have the same feature when having filters on.

Further more , a feature such as expand or collapse all would also be useful (this can be also used for sections )

A post was merged into an existing topic: Display subtasks on List view when project is sorted