Added a SettingsDialog with a "Server" tab to configure the server settings.

mainwindow.h

@@ -68,6 +68,9 @@ class MainWindow : public QMainWindow {
   void postItems();
   void deleteItem();
 
+  /// 'Tools' slots
+  void execSettingsDialog();
+
  private:
   Ui::MainWindow* ui;
 
@@ -112,6 +115,7 @@ class MainWindow : public QMainWindow {
   void createUndoActions();
   void createEditActions();
   void createServerActions();
+  void createToolsActions();
   void createHelpMenu();
   void createGuiDialogs();
 };