Open the Access Bandwidthd UI in a new tab

The Access Bandwidthd tab takes the user completely out of the pfSense WebGUI interface when clicked. This behaviour is not user-friendly. IMHO it is better to open the Bandwidthd UI in a new tab.
Note: the syntax of the double-quotes looks a bit odd - but the underlying package processing functions put double-quotes around the whole thing and it works out!