Aliases in HTML Export

When using the HTML Export method - whether for HTML or other formats - aliases are exported as separate pages in the appropriate location within the output. This makes it easier to use web links to alias content that point to the right place. It also helps when web output uses a hierarchical navigation system as with aTbRef.

Aliases share their original's text and web links but can have their own basic links (if none the original's are used on export).

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