Keyboard shortcut for "Show Offline Buddies" in Pidgin

I like to have fast access to the well-hidden function Show/Offline Buddies in Pidgin's Buddy List. To add a keyboard shortcut to it, you have to change the file ~/.purple/accels:

Change the line
;(gtk_accel_path "/Buddies/Show/Offline Buddies" "")
to
(gtk_accel_path "/Buddies/Show/Offline Buddies" "o")

(It is important to remove the semicolon at the beginning of the line which disables the whole line.)

I chose Ctrl-O (Conversation/Get Info gets still activated with the same shortcut in a conversation window.)