CSS and JS not loaded when a portlet is embedded in a layout plugin

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE, 7.0.0 M3
• Fix Version/s: 6.2.2 CE GA3 , 6.2.X EE, 7.0.0 M1
• Component/s: Liferay Themes, Themes Infrastructure > Layout Templates
• Labels:
  • liferay-fixpack-platform-25-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Story Points: 5
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/19744

when deploying a layout plugin with a portlet embedded, the CSS is not included in the header of the page. Thus the portlet is not displaying correctly.

steps to reproduce
1. deploy the attached portlet and layout plugin
2. in welcome page add the tmpstatic portlet and notice the background is red
3. inspect element of the page and notice the staticmain.css is loaded in the header
4. remove the portlet
5. go to control panel, pages and configure the welcome page to use tmpstatic layout
6. go back to page and see portlet

expected result
portlet has red background and staticmain.css file is loaded into header

actual result
portlet's background is not changed and the staticmain.css is not loaded into header

reproduced in
master and 6.2.x