Migrate mail server

common/users.nix

@@ -123,7 +123,6 @@ in {
         jujutsu = {
           enable = true;
           settings = {
-            git.sign-on-ush = true;
             signing = {
               behaviour = "own";
               backend = "gpg";
@@ -198,21 +197,7 @@ in {
                   iconTasks.launchers = [];
                 }
                 "org.kde.plasma.marginsseparator"
-                {
-                  systemTray.items = {
-                    shown = [
-                      "org.kde.kdeconnect"
-                    ];
-                    hidden = [
-                      "org.kde.plasma.battery"
-                      "org.kde.plasma.bluetooth"
-                      "org.kde.plasma.brightness"
-                      "org.kde.plasma.devicenotifier"
-                      "org.kde.plasma.manage-inputmethod"
-                      "Fcitx"
-                    ];
-                  };
-                }
+                "org.kde.plasma.systemtray"
                 "org.kde.plasma.digitalclock"
               ];
             }

linux/singularity/mailserver.nix

@@ -17,7 +17,7 @@ in {
     };
 
     certificateScheme = "acme";
-    stateVersion = 2;
+    stateVersion = 3;
   };
   sops.secrets = {
     ${userSecret} = {};