Inherited property groups missing in qml docs

see e.g. qml-qtquick-virtualkeyboard-inputpanel-members.html:

-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.alignWhenCentered-prop">anchors.alignWhenCentered</a></b></b> : bool</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.baseline-prop">anchors.baseline</a></b></b> : AnchorLine</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.baselineOffset-prop">anchors.baselineOffset</a></b></b> : real</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.bottom-prop">anchors.bottom</a></b></b> : AnchorLine</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.bottomMargin-prop">anchors.bottomMargin</a></b></b> : real</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.centerIn-prop">anchors.centerIn</a></b></b> : Item</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.fill-prop">anchors.fill</a></b></b> : Item</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.horizontalCenter-prop">anchors.horizontalCenter</a></b></b> : AnchorLine</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.horizontalCenterOffset-prop">anchors.horizontalCenterOffset</a></b></b> : real</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.left-prop">anchors.left</a></b></b> : AnchorLine</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.leftMargin-prop">anchors.leftMargin</a></b></b> : real</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.margins-prop">anchors.margins</a></b></b> : real</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.right-prop">anchors.right</a></b></b> : AnchorLine</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.rightMargin-prop">anchors.rightMargin</a></b></b> : real</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.top-prop">anchors.top</a></b></b> : AnchorLine</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.topMargin-prop">anchors.topMargin</a></b></b> : real</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.verticalCenter-prop">anchors.verticalCenter</a></b></b> : AnchorLine</li>
-<li class="fn"><b><b><a href="../qtquick/qml-qtquick-item.html#anchors.verticalCenterOffset-prop">anchors.verticalCenterOffset</a></b></b> : real</li>