Fix LT-21737: Make highlight button work

[jasonleenaylor]

• Generate xhtml with a nodeId attribute that uses the ConfigurableDictionaryNode hash and use that to set highlight
• Modify the 'Configure Dictionary' right click menu to use the nodeId attribute to select the correct tree node

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This change is 

[aror92]

Reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @jasonleenaylor)

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Src/xWorks/DictionaryConfigurationController.cs line 1589 at r1 (raw file):

					}
				}
				if (topNode == null)

Why is it no longer necessary to check if topNode is null & return in that case?