[Interest] [qdoc] Add links to doc.qt.io w/o adding Qt classes to the project pages

[Christian Gagneraud]

Hi there,

I'm trying to have hyperlinks to doc.qt.io in my project documentation, but i 
don't want to have all the Qt classes, namespaces, etc, ... added to my own 
project's documentation.

So far I'm using this in my project.qdocconf:
indexes = $QT_INSTALL_DOCS/qtcore/qtcore.index \
          $QT_INSTALL_DOCS/qtgui/qtgui.index \
          $QT_INSTALL_DOCS/qtwidgets/qtwidgets.index

but the problem is that my "All Classes" page contains the Qt class list 
(which is massive) and my "All Namespaces" pages contains the Qt namespace.

I'm generating these pages with "\generatelist classes" and "\generatelist 
namespaces"

Any idea how to get this right?

Thanks,
Krys