Refactor user password update logic: Only update password and token if a new password is provided. Update frontend to conditionally include password in the request data, improving user experience and data handling.

Fix: https://github.com/usmannasir/cyberpanel/issues/1509

userManagment/static/userManagment/userManagment.js

@@ -305,11 +305,15 @@ app.controller('modifyUser', function ($scope, $http) {
             firstName: firstName,
             lastName: lastName,
             email: email,
-            passwordByPass: password,
             securityLevel: $scope.securityLevel,
             twofa: $scope.twofa
         };
 
+        // Only include password if it's provided and not empty
+        if (password && password.trim()) {
+            data.passwordByPass = password;
+        }
+
         var config = {
             headers: {
                 'X-CSRFToken': getCookie('csrftoken')