Resolve #3484255 "Support adding additional"

Closes #3484255

added 36 commits

• c5a23cbe...8aeb2ca5 - 15 commits from branch project:11.x
• 8aeb2ca5...ae96ad79 - 11 earlier commits
• 79105269 - Fix unit test
• eef21f03 - Fix test
• 30879f54 - Remove from form displays
• 53b6aa1b - Fix last test
• b9e6f86b - Fix final test
• a3d54d8e - Remove deprecation, no nice way to do it
• cc9aa9d8 - Add support for view mode paths
• d120350f - Working setup
• 051e6797 - Working multi-value path widget/field
• 601af5bd - Empty commit

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