Fix @navtitle inheritance for 1.7 flagging updates
Fix @navtitle inheritance for 1.7 flagging updates

The changes in 4579698 prevent the @navtitle from
overriding the topic <title> element.

This is likely one of several open navtitle bugs:
https://github.com/dita-ot/dita-ot/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen+navtitle+in%3Atitle

dita-ot/docs,infotexture/docs,shaneataylor/docs,infotexture/docs,shaneataylor/docs