Automatically apply parent label to sublabel in Gmail

Question

When labeling a message with a nested label the message does not appear in the parent label, which in my opinion would be the power having a label hierarchy.

Is there a way to automatically apply the parent label when moving a message to a sublabel?

For example, given the following labels...

Pending
    Today
    Week

I would like every message labeled Today to also appear in Pending, without having to apply a filter manually.

Answer 1

I managed to achieve a similar functionality this by enabling the Quick Links lab and then setting a quick link to the following seach:

label:pending OR label:pending-today OR label:pending-week