some fixed in layout management

src/main.c

@@ -586,9 +586,17 @@ create_dialog (void)
     }
 
   /* show widgets */
+  gtk_widget_show_all (vbox);
+#if GTK_CHECK_VERSION(3,0,0)
   if (options.data.width > 0)
     gtk_widget_set_size_request (vbox, options.data.width, options.data.height);
-  gtk_widget_show_all (vbox);
+  else
+    {
+      gint mw, nw;
+      gtk_widget_get_preferred_width (vbox, &mw, &nw);
+      gtk_widget_set_size_request (vbox, nw, -1);
+    }
+#endif
 
   /* parse geometry or move window, if given. must be after showing widget */
   if (!options.data.maximized && !options.data.fullscreen)