Valence 3.0 Portal Button to close all tabs

[JPinTO]

It would be great if the Valence 3.0 Portal had a Button to close all tabs.

This would be similar to the Firefox/CHrome tab function to allow you to quickly
close all the myriads of tabs that tend to popup.

- JP

[eweiler]

This is a good idea, I've added it to our development wish list.