mossy:
See
https://trac.torproject.org/projects/tor/ticket/30600 .
It's a pretty contentious issue, with Tor Browser devs closing as
WONTFIX because they plan to introduce a new permissions UI sometime in
the future.
The NoScript widget still exists, and in fact its use is apparently
still necessary for some sites to work, but you'll have to manually add
the widget back to the toolbar (Settings button > Customize... >
Right-click NoScript > Add to Toolbar).