Unify wxQT helpers code (*_qt.cpp) inside main source files (*.cpp), some headers (*_qt.h) remains independent to avoid include problems (first stage to remove moc)
Remove Q_OBJECT and Q_SLOTS from wxQT headers to avoid vtable linking issues (second stage to remove moc)
Use new Qt5 syntax to connect signals to QObject's member functions in wxQT, removing SLOT and SIGNAL macros (third stage to remove moc)