Success message alert container is behind Add button in Web Content admin portlet.

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: Master
• Fix Version/s: None
• Component/s: Frontend Infrastructure
• Labels:
  • QA-V
  • UI
• Story Points: 1
• Fix Priority: 3
• Git Pull Request: https://github.com/jonmak08/liferay-portal/pull/1844

Add button's z-index is higher than alert container's.

Steps of reproduction:

1. Navigate to Content -> Web Content
2. Add a new Folder or Basic Web Content

Expected result:
Success message floats over everything.

Actual result:
Add button covers, the success message's close button.