Remove or make optional tons of debug messages from wxQt

Using the library wasn't really possible with all the debug messages it
generated, so either suppress them completely or turn them into trace messages
which can be activated on demand if needed.

src/qt/dcclient.cpp

@@ -102,9 +102,6 @@ wxClientDCImpl::~wxClientDCImpl()
             {
                 // only force the update of the rect affected by the DC
                 widget->repaint( rect );
-                wxLogDebug( wxT("wxClientDC Repainting %s (%d %d %d %d)"),
-                           (const char*) m_window->GetName(),
-                           rect.left(), rect.top(), rect.width(), rect.height());
             }
             else
             {