qdoc doesn't show signals inherited from an internal qmlabstract base class

A) The CheckBox control inherits AbstractCheckable, which is an abstract and internal QML type. AbstractCheckable properties show up in the CheckBox docs as they should, but the AbstractCheckable::clicked signal is missing:

http://doc-snapshot.qt-project.org/qt5-dev/qtquickcontrols/qml-qtquick-controls1-checkbox.html

B) The Button control inherits BasicButton, which is also an abstract and internal QML type. BasicButton properties show up in the Button docs, but the BasicButton::clicked signal is missing here as well:

http://doc-snapshot.qt-project.org/qt5-dev/qtquickcontrols/qml-qtquick-controls1-button.html