diff --git a/Server/config_editor_models.py b/Server/config_editor_models.py
index 137fd4b..146126c 100644
--- a/Server/config_editor_models.py
+++ b/Server/config_editor_models.py
@@ -229,10 +229,10 @@ def ensure_unique_names(item, include_self=True):
 class ConfigModel(QtCore.QAbstractItemModel):
     def __init__(self, parent=None, widget=None,
                  headers=("Option", "Value", 'Comment', 'Inline Comment')):
+        self.rootItem = ConfigModelItem(headers)
         super(ConfigModel, self).__init__(parent)
         self.widget = widget
 
-        self.rootItem = ConfigModelItem(headers)
         self.do_color = True
 
         self.initial_comment = ''
@@ -883,7 +883,12 @@ class ConfigDialog(QtWidgets.QDialog):
             on_restart()
         return True
 
-    def call_standalone_dialog(self):
+    @classmethod
+    def call_standalone_dialog(cls):
+        dialog = cls()
+        dialog._call_standalone_dialog()
+
+    def _call_standalone_dialog(self):
         path = QFileDialog.getOpenFileName(self, "Select configuration or specification file",
                                            filter="Config and spec files (*.ini)")[0]
         if not path:
diff --git a/Server/server_qt.py b/Server/server_qt.py
index 0b980f0..ae94d15 100644
--- a/Server/server_qt.py
+++ b/Server/server_qt.py
@@ -139,7 +139,6 @@ class MainWindow(QtWidgets.QMainWindow):
         self.ui.action_edit_any_config.triggered.connect(ConfigDialog.call_standalone_dialog)
         self.ui.action_edit_server_config.triggered.connect(self.edit_server_config)
 
-
         self.ui.action_restart_server.triggered.connect(restart)
         self.ui.action_update_server_git.triggered.connect(update_server)