+ Allow access to tab panel of combo view, fix some typos

src/Gui/Control.cpp

@@ -136,6 +136,16 @@ void ControlSingleton::showDialog(Gui::TaskView::TaskDialog *dlg)
     }
 }
 
+QTabWidget* ControlSingleton::tabPanel() const
+{
+    Gui::DockWnd::CombiView* pcCombiView = qobject_cast<Gui::DockWnd::CombiView*>
+        (Gui::DockWindowManager::instance()->getDockWindow("Combo View"));
+    // should return the pointer to combo view
+    if (pcCombiView)
+        pcCombiView->getTabPanel();
+    return 0;
+}
+
 Gui::TaskView::TaskDialog* ControlSingleton::activeDialog() const
 {
     return ActiveDialog;