update nixos config, update install-new-desktop.sh

nixos/chromeos-extra-hardware-configuration.nix

@@ -0,0 +1,31 @@
+# This is a custom file for a chromebook.
+
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  services.logind.extraConfig = ''
+    # disable power button. This is for the chromebook
+    HandlePowerKey=ignore
+  '';
+
+  # Set an usable key configuration: Ctrl at capslock, Win at Alt, Alt at Ctrl
+  services.xserver.displayManager.sessionCommands =''
+    ${pkgs.xorg.xmodmap}/bin/xmodmap "${pkgs.writeText  "xkb-layout" ''
+      !
+      ! Swap Caps_Lock and Control_L
+      !
+      
+      remove control = Control_L
+      remove mod1 = Alt_L
+      remove mod4 = Super_L
+      
+      keysym Control_L = Alt_L
+      keysym Super_L = Control_L
+      keysym Alt_L = Super_L
+      
+      add control = Control_L
+      add mod1 = Alt_L
+      add mod4 = Super_L
+    ''}"
+  '';
+}