RegisterAdditionalEditors() to work even if no wxPropertyGrids created, in sample moved editor registration before first CreateGrid() call to prevent crash, removed wxPG_USE_WXMODULE support

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55953 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/advprops.cpp

@@ -1993,6 +1993,10 @@ void wxPropertyGridInterface::InitAllTypeHandlers()
 
 void wxPropertyGridInterface::RegisterAdditionalEditors()
 {
+    // Register editor classes, if necessary.
+    if ( wxPGGlobalVars->m_mapEditorClasses.empty() )
+        wxPropertyGrid::RegisterDefaultEditors();
+
 #if wxUSE_SPINBTN
     wxPGRegisterEditorClass(SpinCtrl);
 #endif