statusbar: added basic task UI feedback without requiring the task

manager to be open

app/task/taskmanager.h

@@ -51,14 +51,16 @@ public:
    */
   virtual ~TaskManager();
 
-  DISABLE_COPY_MOVE(TaskManager)
-
   static void CreateInstance();
 
   static void DestroyInstance();
 
   static TaskManager* instance();
 
+  int GetTaskCount() const;
+
+  Task* GetFirstTask() const;
+
 public slots:
   /**
    * @brief Add a new Task
@@ -87,6 +89,11 @@ signals:
    */
   void TaskAdded(Task* t);
 
+  /**
+   * @brief Signal emitted when any change to the running task list has been made
+   */
+  void TaskListChanged();
+
 private:
   /**
    * @brief The Status enum