The 'pick chat network' binding on F1 lists tmux windows as follows
and tmux's `choose-tree -Z' lets you jump to the window by pressing the
key denoted inside parantheses.
Set `base-index 1' so as to make window indices match up the hotkey
number instead of being off-by-one due to the session itself being the
first entry in the list.
(0) - chat-5: 8 windows (group chat: chat-0,chat-1,chat-2,chat-3,chat-4,chat-5,chat-6) (attached)
(1) ├─> 1: hackint: "example.com"
(2) ├─> 2: efnet: "example.com"
...
PS: Update existing sessions by updating chat.tmux.conf, pressing F5
then running `prefix-: move-window -r' to renumber all windows.