Currently files are cached completely before shown, but a better aproach would be to load only that which is shown.
QTextStream allows many adjustments and those could be adjusted through the GUI and saved through TagContainer.
m_sender should be guarded (i.e. QPointer<QObject>)
m_transmitter should be const
copy-constructor and operator= should be implemented.
Doxygen stops copying at a (sub)section so \copydetails can not be used for the documentation. Couldn't find a descent alternative.
Refering to section "detailed description" should be possible. Currently only anchors are an option.