Avoid "Gtk-WARNING **: State doesn't match"

See https://github.com/wxWidgets/wxWidgets/pull/232

src/gtk/textctrl.cpp

@@ -1835,6 +1835,7 @@ void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
             gtk_style_context_save(context);
             gtk_style_context_add_class(context, GTK_STYLE_CLASS_VIEW);
         }
+        gtk_style_context_set_state(context, selectedFocused);
         gtk_style_context_get(context, selectedFocused,
             "color", &fg_orig, "background-color", &bg_orig,
             NULL);