Thumbnail and picture order, next and previous links, back link to subcategory

[ziissi]

1) In "import pictures" function, I would be very pleased to see an option where you can select that are the pictures sorted ascending or descending by filename.

2) Next and previous links are both showed in first and last picture of category. Is there way to show just the correct one?

3) If you use a lot of subcategories (like I do), there's no back link to upper subcategory.