tmux: Replace selfinsert.sh with a command-prompt

.config/tmux/tmux.conf

@@ -118,8 +118,9 @@ bind -T resize 4 selectl main-vertical   \; switchc -T resize
 bind -T resize 5 selectl tiled           \; switchc -T resize
 bind r switchc -T resize
 
-# Switch to selfinsert key-table. See execution of tmux_selfinsert.sh below
-bind C-v switchc -T selfinsert
+# Make it possible to send keys that are bound in the root key table. (C-h for
+# example is sometimes needed as backspace sequence)
+bind C-v command-prompt -k -p (selfinsert) { send "%%" }
 
 # Synchronize the panes in the current window with `<prefix>S`
 bind S set -w synchronize-panes
@@ -203,16 +204,5 @@ set -g window-status-format \
 	"#[fg=#{@ui_color}]"$window_status
 setenv -ghu window_status
 
-# Create a key-table which self-inserts all keys that are bound in the root key
-# table. (C-h for example is sometimes needed as backspace sequence)
-# NOTE: This should stay at they very bottom after all keybindings were set
-#
-# tmux_selfinsert.sh:
-#
-# tmux list-keys -T root | awk '{print $4}' | while read key; do
-#   tmux bind -r -T selfinsert "$key" send
-# done
-run-shell -b "$XDG_CONFIG_HOME/tmux/tmux_selfinsert.sh"
-
 # Initialize TMUX plugin manager. Keep this line at the very bottom.
 run -b "$XDG_CONFIG_HOME/tmux/plugins/tpm/tpm"

.config/tmux/tmux_selfinsert.sh

@@ -1,8 +0,0 @@
-#!/bin/sh
-#
-# Create a key-table which self-inserts all keys that are bound in the root key
-# table. (C-h for example is sometimes needed as backspace sequence)
-
-tmux list-keys -T root | awk '{print $4}' | while read key; do
-	tmux bind -r -T selfinsert "$key" send
-done