Feature request: recursive dependency filter

Is there a filter for tasks that depend, directly or indirectly, on a specific task?
I know of this issue which deals with only direct dependencies: #2193.

Imaginary example:
```
$ task add save princess # (1)
$ task add depends:1 defeat bowser # (2)
$ task add depends:2 find the castle # (3)
$ task add mow the lawn # (4)
$ task depends:1 # show all tasks that depend on task 1
ID Deps Description
-- ---- -----------
1 save princess
2 1 defeat bowser
3 2 find the castle

```