Adding content via product navigation control menu does not add a portlet to a page

• Type: Regression Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: Master
• Fix Version/s: None
• Component/s: Pages > Widget Pages
• Labels: None
• Fix Priority: 4
• Last Working Version:
  7.2.X

Steps to reproduce

1. Add a widget page
2. Navigate to the widget page
3. In the top menu, click the "+" button to get the right-hand panel to add a Widget or Content
4. Switch to the Content tab
5. Choose to add a new Basic Web Content
6. Fill in a title and publish

Expected behavior is that this adds a web content display portlet, the way it does in 7.2.x.

Actual behavior is that it doesn't do anything.