EXT-7511 FIXED Fixed cropping of selection in Edit Outfit.

Cropping was caused by drawing separator over bottom part of the item (including selection).

- Moved separator under the item- not inside of it. This way item and selection are not cropped. The only requirement for using lists that consist of items with separators is that their item_pad attritubute is >= height of separator.

Reviewed by Neal Orman at https://codereview.productengine.com/secondlife/r/780/

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branch : product-engine