Vocabulary - Associated Asset Type (-) button works incorrectly

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.6 CE GA7, 7.0.X, Master
• Fix Version/s: Master
• Component/s: Frontend Infrastructure
• Labels:
  • 7.1-could
  • QA-V
  • profiq
• Fix Priority: 2
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/70198

Steps:

1. Go to Site menu> Categorization>Categories
2. click  button 
3. expand associated asset types category
4. Click on  button

Expected result: If nothing is changed in this form, clicking on  button don't raise number of deletions.

Actual result: When You click  button, You can't remove this form, but portal count this deletions and can "undo" it.

Reproducible:

• Server: Liferay master GIT id: c1eb2f719b2cbaee14ee2292cd38d5fc79e03342, MySQL 5.6, Tomcat 9.0.8, Liferay 7.0.6 GA7
• Client: Firefox 60, Chrome 67 (Linux 64bit)

Fix priority: S3 + L2 = 3