Issue Summary

Adding too many items to projectSettings module of an app causes the navigation panel to not be scrollable

Steps to Reproduce

1. Create a new Forge app that implements `projectSettings`,
2. Add many sub items and pages to it, for example:

   jira:projectSettingsPage:
       - key: custom-ui-project-settings-hello-world-page
         resource: main
         resolver:
           function: resolver
         title: custom-ui-project-settings
         sections:
           - header: My Header 1
             pages:
               - title: Sub-page of My Header 1
                 route: '/'
           - header: My Header 2
             pages:
               - title: Sub-page 1 of My Header 2
                 route: '/testPage1'
               - title: Sub-page 2 of My Header 2
                 route: '/testPage2'
               - title: Sub-page 3 of My Header 2
                 route: '/testPage3'
               - title: Sub-page 4 of My Header 2
                 route: '/testPage4'
           - header: My Header 3
             pages:
               - title: Sub-page 1 of My Header 3
                 route: '/testPage5'
           - header: My Header 4
             pages:
               - title: Sub-page 1 of My Header 4
                 route: '/testPage6'
           - header: My Header 5
             pages:
               - title: Sub-page 1 of My Header 5
                 route: '/testPage7'
               - title: Sub-page 2 of My Header 5
                 route: '/testPage8'
           - header: My Header 6
             pages:
               - title: Sub-page 1 of My Header 6
                 route: '/testPage7'
               - title: Sub-page 2 of My Header 6
                 route: '/testPage8'
   

3. Deploy and install the app to an instance;
4. Navigate to a project settings page and access the app's item;

Expected Results

When may pages/items are added, Jira adds a scroll so that they are all accessible.

Actual Results

Jira does not add a scrollbar and some items are not accessible if they are too far down on the navigation panel;

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available