layout: reset disabled status after refreshing the widget theme.

This fixes many potential bugs which will loose disabled status after
theme hook.
Thanks a lot kuuko for the report.
This fixes T608.

legacy/elementary/src/lib/elm_layout.c

@@ -372,6 +372,8 @@ _elm_layout_smart_theme(Eo *obj, void *_pd, va_list *list)
 
    _visuals_refresh(obj, sd);
 
+   eo_do(obj, elm_wdg_disable(&int_ret));
+
    if (ret) *ret = int_ret;
 }