I have a very small feature request.
I've recently been going through my library and manually assigning groups (even though smart groups work fine!) and I've been using keyboard shortcuts (aka apple-1, apple-2 etc.) however, if you are looking at the main list view of bookends, then assign a reference to a group by using a keyboard shortcut, the "focus" shifts from the list view (where the references are) to the group pane (where the list of groups are). Therefore, if I was using arrow keys to work my way through my references, I have to click onto the list view to activate it again, so I can continue using arrow keys to work my way through the list. The focus shift is useless, although I suspect it's simply a gimmick of the programming. The group pane was interacted with so therefore it is now the "focus". Compare this to how finder works, if you drag a file to the left pane it doesn't shift the focus, and you can still use the keyboard to navigate files in the folder.
It's not a problem, and there are probably many other things to focus on (no pun intended), but it's just annoying when trying to manually organize references (even though I could probably just add all of the references I want to the hits list, then drag them over to the group I want all at once). Still, I try to avoid using the mouse if possible! I wonder if there's a keyboard shortcut to add to hits list... EDIT: Not that I can find

I guess I could write an iKey script to click where the mouse is after I push the shortcut. That'd work well enough! (And by "write" I mean click a few buttons! But hey, it's the closest thing to autoit or autohotkey Mac users have!) Wow I'm off topic.