qdoc: Obsolete/deprecated methods not marked as such in the WebXML output

When using qdoc to generate the documentation as WebXML, I noticed that many functions should be marked as obsolete/deprecated, but are not in WebXML.

For instance, in QAbstractEventDispatcher, this is the content of the WebXML file (status="active") for filterEvent:

<function threadsafety="unspecified" name="filterEvent" fullname="QAbstractEventDispatcher::filterEvent" href="qabstracteventdispatcher.html#filterEvent" status="active" access="public" location="qabstracteventdispatcher.h" filepath="C:/Qt/5.11.1/Src/qtbase/src/corelib/kernel/qabstracteventdispatcher.h" lineno="115" virtual="non" meta="plain" const="false" static="false" overload="false" delete="false" default="false" final="false" override="false" type="bool" signature="bool filterEvent(void *message)">
 <parameter type="void *" name="message" default=""/>
 <description path="" line="0" column="0"/>
 </function>

However, this method should not be active. Indeed, it is not shown in http://doc.qt.io/qt-5/qxmlnodemodelindex.html (but it is in the obsolete methods http://doc.qt.io/qt-5/qabstracteventdispatcher-obsolete.html#filterEvent and in Qt 4.8's documentation http://doc.qt.io/archives/qt-4.8/qabstracteventdispatcher.html#filterEvent). Moreover, the CPP source clearly indicates \deprecated (https://github.com/qt/qtbase/blob/c5307203f5c0b0e588cc93e70764c090dd4c2ce0/src/corelib/kernel/qabstracteventdispatcher.cpp#L473). However, the method is not present in PySide's documentation.

The same happens with QWheelEvent::orientation (https://github.com/elProxy/qtbase/blob/4933c8077d99c1b84117d7e5ece7daf13867bc70/src/gui/kernel/qevent.cpp#L573).

I generated the WebXML source based on Qt 5.11.1 sources, using qdoc from Qt 5.12.0. All of these were installed with the standard maintenance tool for Windows ("Qt Online Installer for Windows").