Mobile Device Rules - Close button does not work after clicking save button on Manage Rule Priorities

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.1.10 DXP FP3, 7.1.1 CE GA2, 7.1.10.1 SP1, 7.1.X, Master
• Component/s: Portal Services > Mobile Device Rules
• Labels:
  • liferay-dxp-71-sp1
  • liferay-fixpack-dxp-3-7110
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/62931

Steps to reproduce:

1. Create 2 mobile device family (MDF)
2. Navigate to Control Panel > Build > Pages > Configure Icon next to Public Pages
3. Click Advanced
4. Under Mobile Device Rules > Select the created MDF
5. Add the second created MDF to the list
6. Click Manage Rules Priorities button
7. Click Save
8. Click Close

Expected Result:
Pop up window closes

Actual Result:
Pop up window remains visible

Reproduced on:
Tomcat 9.0.6 + MySQL 5.7
Portal Master GIT ID: 618923d93076e85a9fa476365d233c5312be2d21.