Private messaging: New Message UI does not follow Lexicon patterns

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.0.0 DXP FP8, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: Collaboration, Private Messaging
• Labels:
  • liferay-digital-enterprise-70-sp2
  • liferay-fixpack-de-8-7010
• Story Points: 1
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/45000
• QA Test Name:
  • dont-test-again

Improve the UI of the "New Message" dialog to follow the Lexicon patterns.

Steps:

1. In the menu, select Test (user) > My Dashboard
2. Add the Private Messaging portlet
3. Add "New Message". A dialog with broken UI is opened. See screenshot