Adds help flag for ObjectEditor and ObjectEditorFactory to HowTo Build A Custom Editor.vl

[bj-rn]

PR Details

See Title.

Description

Adds help flag for ObjectEditor to HowTo Build A Custom Editor.vl. Added a "dummy" ObjectEditorFactory node to the patch to be able to set the help flag for it since adding the flag to the node that is uses inside the CustomEditors class didn't work.

Motivation and Context

ObjectEditor and ObjectEditorFactory had no help patch associated. Searching for ObjectEditor in help browser yielded no results.

Types of changes

• [x] Docs change
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)