Favorite count not removed when the favorite structure is deleted

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.0 Beta 1, Master
• Fix Version/s: 7.1.0 Beta 2, 7.1.X, Master
• Component/s: WCM
• Labels: None
• Story Points: 5
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/58886

Steps to reproduce:

1. Go to Site Admin > content > Web Content > Structure
2. Add 15 Structures so that the More button can shows up
3. Back to Web Content tab, click Plus icon, click more
4. Mark one of the added structures as favorite
5. Assert the Add to Favorites (1)
6. Back to Web Content tab, click Plus icon, check the one you marked as favorite in step4 listed under FAVORITES
7. Delete the one you marked as favorite
8. Back to Web Content tab, click Plus icon, check no FAVORITES listed in the items
9. Click More again

Expect Result:
Add to Favorites (1) column changes to Add to Favorites (0)

Actually Result:
Add to Favorites (1) column still shows you have one item selected as favorite.

Note This issue not affects 7.0, seems like 7.1's new feature.