refs #325, added async update member function to CListModelBase / CViewBase (+ resize modes)

* model:
** required a non templated base class for Q_OBJECT / slots
** added worker for thread, QConcurrent is not used as it does not work with template classes
* views:
** added cpp file for view base class
** added template parameter for container in views
** different modes how resizing will be applied

src/blackgui/views/clientview.h

@@ -20,7 +20,7 @@ namespace BlackGui
     namespace Views
     {
         //! Client view
-        class CClientView : public CViewBase<Models::CClientListModel>
+        class CClientView : public CViewBase<Models::CClientListModel, BlackMisc::Network::CClientList>
         {
         public:
             //! Constructor