tmux: Make <prefix>[hjkl] bindings repeatable

I sometimes need the `<prefix>[hjkl]` bindings over `C-[hjkl]` (e.g. vim
insert mode). Then it is nice to have them repeatable when navigating to
a pane further away.

.config/tmux/tmux.conf

@@ -80,10 +80,10 @@ bind -T copy-mode-vi Escape \
 # NOTE: C-[hjkl] (w/o prefix) moves through vim splits and tmux panes
 #       See vim-tmux-navigator
 unbind l
-bind h selectp -L
+bind -r h selectp -L
-bind j selectp -D
+bind -r j selectp -D
-bind k selectp -U
+bind -r k selectp -U
-bind l selectp -R
+bind -r l selectp -R
 
 # Resize mode similar to my i3 config
 bind -T resize h resizep -L \; switchc -T resize