In the mean time, if you are using 3.7 beta, I suggest you name your items nicely then you can use the search filter to filter out unwanted item in the Hierarchy.
For examlpe:
set1_talk
set1_walk
set1_run
set2_talk
set2_walk
set2_run
...
You can then enter set1 to the search box, other non-set1 items will be hidden.
Remember to turn on the filter mode. Otherwise it will only do highlight.