I was playing around in the branch that adds AI assistant and spotted two pretty obvious issues I missed when initially adding the declarative drawer interface

• When switching between sections in toolbar, the content wouldn't get rerendered because the portal rendering logic we have wasn't accounting for mutated nodes (as opposed to nodes being added / removed). We can track attributes changes in the mutation observer, but a bit more straightforward way of dealing with this is to force React to re-mount the section via the key prop on the anchor element.
• We are adding sections to the toolbar data dynamically, based on the page context. When there's only one section and it is removed, our code handles removing the drawer completely just fine, but when an open section gets removed and there are more sections than one, Leafygreen component doesn't really handle it in any special way and the drawer stays open showing nothing. I reported this to leafygreen and for now opting for an easy fix that closes the drawer if there's no content to render. I'll keep an eye on how exactly they are planning to resolve this on their end and will update our fix if needed to align the behaviors