Account for categorytree extension

Many of our users used the categorytree macro, which is basically a tree that displays all pages with <TAG>.

https://www.mediawiki.org/wiki/Extension:CategoryTree

On import this extension is not accounted for or converted into a macro - instead left as raw source "<categorytree mode="all">TAGNAME</categorytree>"

It should at least convert it to "categorytree" macro so a custom macro can be created to catch all instances, otherwise you have to manually resolve the issue on every page.

For example I created a macro stealing the "viewtag" section of the tag page which would have resolved the issue but since it was not converted to a macro I cannot easily resolve it.