Convert Private Messaging to Marketplace Lab App

• Type: Story
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.0.0 DXP FP2, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: ~ [Archived] Collaboration
• Labels:
  • liferay-digital-enterprise-70-sp1
  • liferay-fixpack-de-2-7010
  • liferay-fixpack-de-4-7010
• Sprint: Löllingite
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/42925

The aim of this story is extracting the Private Messaging module from the main build and convert it into an independent Marketplace LabApp.
A similar functionality could be found aswel with the Chat.