I think I can add this feature, so you can open the clipboard window on the screen with the currently focused window. I think a screen with the currently focused window should be treated as active. It's because I can keep my mouse cursor on secondary screen and work (type something) inside a window on the primary screen. Or just add both preferences, so you can decide yourself which screen should be treated as active.

To be honest I'm not sure which one is better. Where the mouse pointer or where your cursor is. Thank you for considering this.