tmux: Number windows with 1-based indices

It is counter intuitive to have to reach to the right for the first
window.

.config/tmux/tmux.conf

@@ -59,6 +59,8 @@ bind F resizep -Z
 
 # Automatically renumber windows when closing one
 set -g renumber-windows on
+# Number windows with 1-based indices
+set -g base-index 1
 
 # Enter copy-mode and scroll one page up directly with PageUp without the need
 # of the prefix. (Exists already per default with prefix)