Structure fields are not available if we edit the template directly from the Web Content Display

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X
• Fix Version/s: 7.1.10 DXP FP18, 7.1.X
• Component/s: Dynamic Data Mapping > Template Editor, ~[Archived] WCM
• Labels:
  • ee-ts
  • liferay-fixpack-dxp-18-7110
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/18585

Steps to reproduce:

1. Start a DXP 7.1 with the latest Fix Pack (16)
2. Create a structure with some fields
3. Create a template for it
4. Create a web content using the structure
5. Put that web content in a Web Content Display on a page
6. Go to its 'Edit template' option

Expected behavior: Structure fields should be available there

Actual behavior: Structure fields are not shown

Also tested: 

 7.1x @ commit (a92d39153a1b0445e5d0edc029616a8d5ed8e71b) reproduced
 master @ commit (b9279a99b18ccae353cd1dab63d5ebf9f729f09e) works