0.90 beta 1 - contact sheet - sorting function does not work in thumbnail view

[masterjp]

The new contact sheet generator and window is great! Thank you.
By default you see thumbnails of your pictures. Above the thumbnails you see a sorting function (sort by filename, size, etc.).
This does not work in thumbnail mode. If I use the list mode it will work perfect. Is it possible to add it in thumbnail mode, too?

[xnview]

right, i'll fix it