This update fixes a bug introduced by the extensive changes
for QTBUG-35377. Three node subtypes - Group, Module, and
QML module, were promoted to be first line node types in the
update for QTBUG-35377. This broke the file name construction
routine for those node subtypes, which used to have the DocNode
node type. This caused empty ref attributes to appear for those
keyword elements in the qhp file. The file name construction
routine has now been corrected to account for this.
Task-number: QTBUG-37658
Change-Id: I307979255fdfd48493b3a4cebaf996b2130bc2c7
Reviewed-by: Martin Smith <martin.smith@digia.com>