Moved the Fileds from the Page object to the respective OptionGroups

for performance reasons. Disabled clearing of background for most
of the static texts and Fields stored into OptionGrops.

src/slic3r/GUI/GUI_App.cpp

@@ -17,6 +17,7 @@
 #include <wx/dir.h>
 #include <wx/wupdlock.h>
 #include <wx/filefn.h>
+#include <wx/sysopt.h>
 
 #include "libslic3r/Utils.hpp"
 #include "libslic3r/Model.hpp"
@@ -98,6 +99,8 @@ bool GUI_App::OnInit()
     SetAppName("Slic3rPE-alpha");
     SetAppDisplayName("Slic3r Prusa Edition");
 
+//    wxSystemOptions::SetOption("msw.staticbox.optimized-paint", 0);
+
 //     Slic3r::debugf "wxWidgets version %s, Wx version %s\n", wxVERSION_STRING, wxVERSION;
 
     // Set the Slic3r data directory at the Slic3r XS module.