Knowledge base display portlet goes blank when choosing empty folder with only drafts

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, Master
• Fix Version/s: Master
• Component/s: Knowledge Base
• Labels:
  • QA-V
  • ee-ts
• Fix Priority: 4
• Sprint: 025 - Pikachu
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/72423

Steps to reproduce

1. Sign in as a portal administrator
2. Navigate to Content & Data > Knowledge Base
3. Add a new Knowledge Base article to the home folder (Article 0)
4. Add a new Knowledge Base folder (Folder 1)
5. Add a new Knowledge Base article to Folder 1, but use "Save as Draft" instead of "Publish" (Article 1)
6. Add a Knowledge Base display portlet to a page
7. Observe that Folder 1 is available in the dropdown select menu
8. Select Folder 1 from the dropdown select menu

Expected results: Folder without approved articles do not display in the dropdown. If there are no folders with approved articles, dropdown does not display.
Actual results: Dropdown displays, and the folder with ONLY a draft article is an option. Clicking on it results to blank KB display widget.