disable tmux-sensible

There's a bug between current tmux 3.5a and tmux-sensible@25cb91f that
makes it always use sh instead of correct $SHELL

https://discourse.nixos.org/t/tmux-use-bash-instead-defined-zsh-in-home-manager/54763/2
nix-community/home-manager#5952

will need fix here:
- tmux-plugins/tmux-sensible#75

but I may not actually need sensible at all with home-manager tmux config

home/sme/bluestreak.nix

@@ -427,6 +427,7 @@ in {
     # Force tmux to use /tmp for sockets (WSL2 compat)
     secureSocket = false;
     clock24 = true;
+    sensibleOnTop = false;
     plugins = with pkgs.tmuxPlugins; [
       # First plugins that adjust the right status bar
       {
@@ -449,10 +450,11 @@ in {
         extraConfig = ''
           set -g @continuum-restore 'on'
           set -g @continuum-boot 'on'
+          set -g @continuum-boot-options 'alacritty,fullscreen'
           set -g @continuum-save-interval '15' # minutes
         '';
       }
-      sensible
+      # sensible
       better-mouse-mode
       extrakto # prefix + tab
       fzf-tmux-url # prefix + u