Respond to ADR feedback

Author: matt-bernhardt

docs/architecture-decisions/0005-implement-an-accessible-navigation-system.md

@@ -89,8 +89,19 @@ for an accessible navigation menu for web application.
 There are several significant drawbacks to using this menu library.
 
 * The most significant drawback is that it imposes some operating costs on users
-  of assistive technology that are not ideal. Our recent accessibility testing
-  [included some details about this problem](https://github.mit.edu/Accessibility-FY2024/omeka/issues/4#issuecomment-182190) while we discussed this menu issue.
+  of assistive technology that are not ideal. The library forces the screen
+  reader user to explicitly switch operating mode to interact with the menu, and
+  does not listen for the type of interaction events which users naturally
+  generate while navigating a page.
+
+  > However, the library is not listening for click events; it seems they are
+  > only listening for explicit pointer events. This means you need to switch
+  > into forms mode, then press enter or space, to activate a menu ... It also
+  > seems they are handling keyboard events explicitly for keys that should
+  > normally be handled by the browser like tab and shift+tab.
+
+  (The above comment comes from [our discussion of the navigation menu after
+  accessibility testing](https://github.mit.edu/Accessibility-FY2024/omeka/issues/4#issuecomment-182190).)
 
 * The markup requirements for this library do not immediately align with the
   markup generated by Omeka. While this is manageable by either maintaining a
@@ -175,10 +186,11 @@ Ultimately, though, the review which we've conducted of existing menu libraries
 has not identified such a suitable existing library at this time.
 
 
-## Decision
+## Decision: Option 4
 
-We will develop, and maintain, a small set of javascript and stylesheet rules
-for the navigation menu in this theme.
+We will implement option 4 - a bespoke solution. We will develop, and maintain,
+a small set of javascript and stylesheet rules for the navigation menu in this
+theme.
 
 If this proves sustainable, the feature will be considered for promotion to the
 overall style library in order to make the feature available to our other