failsafe workaround for pane switch not working in nested tmux

tmux.conf

@@ -43,12 +43,10 @@ bind -n C-h run "(tmux display-message -p '#{pane_current_command}' | grep -iq v
 bind -n C-j run "(tmux display-message -p '#{pane_current_command}' | grep -iq vim && tmux send-keys C-j) || tmux select-pane -D"
 bind -n C-k run "(tmux display-message -p '#{pane_current_command}' | grep -iq vim && tmux send-keys C-k) || tmux select-pane -U"
 bind -n C-l run "(tmux display-message -p '#{pane_current_command}' | grep -iq vim && tmux send-keys C-l) || tmux select-pane -R"
-bind -n C-\ run "(tmux display-message -p '#{pane_current_command}' | grep -iq vim && tmux send-keys 'C-\\') || tmux select-pane -l"
-bind -r C-h run "tmux send-keys C-h"
-bind -r C-j run "tmux send-keys C-j"
-bind -r C-k run "tmux send-keys C-k"
-bind -r C-l run "tmux send-keys C-l"
-bind -r C-\ run "tmux send-keys 'C-\\'"
+bind -r C-h run "tmux select-pane -L"
+bind -r C-j run "tmux select-pane -D"
+bind -r C-k run "tmux select-pane -U"
+bind -r C-l run "tmux select-pane -R"
 bind -r C-Down resize-pane -D 2
 bind -r C-Up resize-pane -U 2
 bind -r C-Left resize-pane -L 2