"Copy to Libary (delete after copy)" - Placement Suggestion
I've put this in Library Management as it seems most logical, please move if more appropriate in Development or somewhere else.
I maintain a few libraries for different purposes. The main working library is on my local machine but I copy lot of books onto a networked library on a NAS to make them available to any machine in the house.
When I select a book to copy to "Calibre Network" the selection "Copy to library (delete after copy)" is directly below the "Copy to Library" line. On a number of occasions I've found myself on the point of deleting a book after copying because the mouse pointer has slipped down a few pixels.
To my mind it would make more sense to segregate the (delete after copy) selections in a separate section of the menu, e.g. lines 1-4 = Copy to library a/d, insert separator line, and lines 5-8 = Copy to libary a/d (delete after copy), rather than having the delete option right next to the copy option.
This would reduce the possibility of inadvertently deleting a book from my main, master library on copy.