Create a framework to allow developers to add non obstrusive messages at portal level

• Type: Story
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 6.2.0 CE B1
• Component/s: User Notifications, ~ [Archived] Collaboration
• Labels: None
• Epic/Theme:
  • Quick_Win
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/11785

We need this for http://issues.liferay.com/browse/LPS-35671 so instead of hardcoding it for this very specific issue we are going to create a more flexible framework that can be used by developers in their own applications.