If the native renderer doesn't support the properties which we map our
attributes to, trying to set them is useless and results in GTK+ warnings so
don't do it.
Add wxDataViewRenderer::GtkSupportsAttrs() which can be overridden to indicate
whether the renderer supports attributes or not. We probably could use
g_object_class_find_property() instead to detect it automatically but for now
these properties are all supported only by GtkCellRendererText and not
supported anywhere else so using a single virtual function seems tidier.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62591 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
c2a738e372