Use nm applet as service

There is no reason to start as program being part of i3.
Instead a service is easier to handle, e.g. restart.

home/services.nix

@@ -9,6 +9,7 @@
     gpg-agent = import ./services/gpg-agent.nix {
     };
 
+    network-manager-applet.enable = true;
     languagetool.enable = true;
     mailhog.enable = true;
 

home/windowManager/i3.nix

@@ -182,14 +182,6 @@ in {
       ];
     };
 
-    startup = [
-      # Start programs / applets
-      {
-        command = "nm-applet";
-        notification = false;
-      }
-    ];
-
     keybindings = {
       # kill focused window
       "${modifier}+Shift+q" = "kill";

systems/hikari/configuration.nix

@@ -65,7 +65,6 @@
 
   programs = {
     # Enable network manager applet
-    nm-applet.enable = true;
     dconf.enable = true;
   };