Use Number Key to turn off Viewers too

Right now we can tag viewers using Ctrl+1, 2, 3 to make up persistent Viewer-1, 2, 3.

and when we hit 1,2 or 3 we can turn on each of these viewers.

It's very convenient when working with large node tree that you can use pre-existing viewers.

However we don't have ways to turn them off.

I expect if Viewer-1 is already on, If I hit number "1", it will turn it off.

so I don't need to go over the node tree and turn it off manually.