[Andys]

Hi, I am very glad to see a hotkey for open/close bookmark window in newer version, here's some suggestions I believe would improve keyboard control in viewer

1. After pressing show bookmarks hotkey focus should be switched to this new window. As of now, you have to either press tab to jump through all toolbar items and then you get to bookmarks, or have to use mouse if bookmarks are in undocked window.
2. When the bookmark window is undocked, open/close hotkey should work in it. same as in main viewer window. Currently the hotkey doesn't work at all in undocked bookmarks window, it works only when bookmarks are docked as a sidebar.
3. Maybe a confirmation when deleting bookmark with del key? Just to be safe in case I somehow miss pgup/dn keys
4. Optional/personal usage - when activating bookmark in a list, jump to position and close bookmark window (optional since I can imagine both usages - with closing and without)

Basically, I hope for this scenario - press hotkey, select bookmark, press enter, close bookmarks. All from keyboard and without tabbing a lot