It is not very intuitive to see whether a filter is set or not set on the Feature/Board page. You can possible deduct from the two numbers ( Showing 161 of 161) - which are hard to read or have to click on the Green Filter Icon.
It would be good to have a stronger visual clue.
ADMIN RESPONSE
Feb 21, 2017
We have made adjustments to the filter icon to reflect the "Active" state.
When no filter has been applied, the button will be gray. When a filter has been applied, it will turn green.