Add a similar article for "magic wirds" defined or utilized by SMW

From semantic-mediawiki.org

> It would be good to have a "Magic words" reference article, mimicking this one.

I think it is not really worth doing so since SMW only provides one behaviour switch called __SHOWFACTBOX__ to be used in special circumstances.

> Also still i'm not sure if there is a magic word to hide the all related annotations on property pages.

You mean on special page "Browse"? You can have a look at $smwgBrowseFeatures for ways to adapt the output on this page.

16:38, 2 November 2018