common: zsh changes

nix-config/home/materus/default.nix

@@ -14,7 +14,6 @@
 
 
   home.file = {
-    ".zshrc".source = "${config.xdg.configFile."zsh/cfg".source}/zshrc";
     ".zshenv".source = "${config.xdg.configFile."zsh/cfg".source}/zshenv";
     ".tmux.conf".source = "${config.mkk.dir}/config/tmux/tmux.conf";
   };

nix-config/host/materusPC/configuration.nix

@@ -279,7 +279,7 @@ in
     enable = true;
     enableGlobalCompInit = false;
     interactiveShellInit = ''
-      if [[ ''${__MATERUS_HM_ZSH:-0} == 0 ]]; then
+      if [[ ''${__HOME_ZSHRC_SOURCED:-0} == 0 ]]; then
         source ${pkgs.grml-zsh-config}/etc/zsh/zshrc
       fi
     '';