wb: fix list logic.

Documents/bin/wb

@@ -33,7 +33,9 @@ _kill() {
 }
 
 list() {
-    if in_toolbox && is_tmux_running
+    if is_tmux_running
+    then
+        if in_toolbox
         then
             tmux -L "$TMUX_SOCKET" list-sessions | awk -F: '{print $1}'
         elif container_exists
@@ -41,6 +43,7 @@ list() {
             toolbox run --container "$CONTAINER" -- \
                 tmux -L "$TMUX_SOCKET" list-sessions | awk -F: '{print $1}'
         fi
+    fi
 }
 
 image_exists() {