Added "Server" menu with "fetch items" and "post items" actions to trigger communication with the RESTful server.

mainwindow.h

@@ -63,6 +63,10 @@ class MainWindow : public QMainWindow {
   /// 'Edit' slots
   void findItems();
 
+  /// 'Server' slots
+  void fetchItems();
+  void postItems();
+
  private:
   Ui::MainWindow* ui;
 
@@ -89,6 +93,10 @@ class MainWindow : public QMainWindow {
   unique_ptr<QAction> m_openEditItemDialogAct;
   unique_ptr<QAction> m_deleteItemAct;
   unique_ptr<QAction> m_findItemAct;
+  /// Server actions
+  unique_ptr<QAction> m_fetchItemsAct;
+  unique_ptr<QAction> m_postItemsAct;
+
   /// View actions
   unique_ptr<QAction> m_showModelUndoViewAct;
 
@@ -101,6 +109,7 @@ class MainWindow : public QMainWindow {
   void createFileActions();
   void createUndoActions();
   void createEditActions();
+  void createServerActions();
   void createHelpMenu();
   void createGuiDialogs();
 };